The Hills star Heidi Montag world premiered her single “Body Language” on radio show On-Air with Ryan Seacrest on Thursday morning.

Fans called in giving it rave reviews!!!

And guess who makes a guest appearance on the track rapping?? That’s right, fiance Spencer Pratt breaks it down rap-style on “Body Language.”

“It’s very dance, urban, rhythmical,” Heidi has said. “It’s kind of it’s own genre. It’s very upbeat, very uptempo. I really love a lot of rap and urban music too, so I’m bringing a lot of those elements in. It’s just a really fun dance vibe at the same time.”

Asked KIIS FM co-host Ellen K, “Is she the new Britney?” Is she?????

Listen to Heidi’s “Body Language” here!

UPDATE: This release was apparently a mistake! “We did it as a joke,” Spencer tells People. “It’s not her single at all. It was never meant to be heard by anyone but us. Over my dead body would I rap on Heidi’s first single. Heidi is so upset because this was not the first sound she wanted people to hear from her.”

Heidi Montag and fiance Spencer Pratt leave Koi, a restaurant specializing in Japanese-inspired cuisine with California accents.

After the couple finished dining in West Hollywood, they left the restaurant holding hands. When fans approached them, they happily obliged and posed for photos with fans as they left the eatery.

A satisfying day for Heidi and Spencer’s stomachs and a satisfying day for their fans.

The third season of The Hills premieres Monday, August 13 at 10 PM ET.

The Hills‘ Heidi Montag her boyfriend Spencer Pratt still are at odds with Lauren Conrad.

Spencer has launched his own website and is inviting all haters to leave comments on his blog/message board at spencerpratt.com.

“For all you Haters- Please feel free to Hate on me here on my blog/board were I actually read comments! I think it’s great place for people who can’t stand me to vent and get whatever they have to say off their chest! If it makes you feel better. But if you hate me because you think I ruined Lauren and Heidi friendship…you have your facts all wrong! Lauren ruined Heidi and Laurens friendship when she told Heidi that she could not be friends with her as long as she dated me…the fact is Lauren is in LOVE with Heidi…she used to scream at Heidi if she left her alone one night…she used to ask to get in bed with Heidi and I to cuddle in the mornings…believe what you want…when those cameras turn off LC(BEEF CURTAINS) is a completely different person…she goes back to being the spoiled brat that made her famous on Laguna Beach…excuse me…the famous Boyfriend stealer. The funny thing to me is that she says we use her for attention…when she is the one in USWeekly this week talking about Heidi and I for 6 pages…talk about a desperate loser that needs to get her own relationship to worry about OR TALK ABOUT…I mean this girl has not had one functional relationship in her whole life and she is going to try and tell Heidi how to live her life and relationships!HA The LC is a pathetic wannabe fashion designer…who can’t even dress herself and look good…how is she going to design a line…ha…it should be called BEEF CURTAINS by LC… I only call her this because this is what people like Brody Jenner, Steven Coletti, and Jason Whaler all go around calling her…IT’S SAD that she destroyed the SEX TAPE that DID EXIST…because those BEEF CURTAINS would have made her real FAMOUS! I hate even talking about LC(BEEF CURTAINS) but she continues to talk about Heidi and I in all her interviews…so until she shuts her ugly mouth…I am going to continue to tell the world the truth about LC! This is a WARNING to LC… her dad aka JOE SIMPSON JR. , Manager, Agent, and Publisist that you better warn your client that she is starting a WAR that she doesn’t want…SO STOP TALKING ABOUT HEIDI AND MYSELF…because the TRUTH WILL ALWAYS PREVAIL AND YOU DO NOT WANT HEIDI AND I TO TAKE A PUBLIC LIE DETECTOR TEST ABOUT ALL THE THINGS WE KNOW ABOUT YOU AND YOUR BEEF CURTAINS…”

Them fighting words!

Season 3 of The Hills kicks off on August 13. Pictures below include Heidi and Spencer vacationing together earlier this week in Puerto Vallarta, Mexico.

Heidi Montag and fiance Spencer Pratt, aka America’s favorite couple, catch a flight out of LAX airport on Thursday in Los Angeles.

Heidi worked her brain power and wrapped her head around Chinese military treatise Art of War by philosopher Sun Tzu. The Hills star read up on warfare, military strategies and tactics. Thius hould help her feud with exx BFF Lauren Conrad!

Being the consummate gentleman, Spencer carried Heidi’s bags.

Earlier in the week, the couple stopped off for ice cream cones. Heidi looked to be wearing her engagement ring out in public!

WHAT DO YOU THINK of the rock on Heidi’s ring finger?

25+ pictures inside of Heidi’s engagement ring and intellectual reading… More Here! »

Heidi Montag and fiance Spencer Pratt just happen to get photographed yet again while frolicking on the beach on Independence Day in the Pacific Palisades. The Hills honey got into the holiday spirit, turning heads in a stars and stripes bikini. Quite the festive July 4th bikini!

See part I, part II and part III of Heidi and Spencer’s adventures on the beach. How many of these photo ops do you think they’re under contract for?

Other pictures inside Heidi, 20, and Spencer, 23, out on the town late last month on Sunset Boulevard in West Hollywood, Calif.

25+ pictures inside of Heidi & Spencer marching on their PDA parade… More Here! »

America’s favorite “love to hate” couple Heidi Montag and Spencer Pratt from MTV reality TV show The Hills enjoy another barefoot photo shoot stroll along the Malibu beaches earlier this week.

The couple will celebrate their one-month engagement anniversary next weekend after being together for only nine months.

Other pictures include Heidi and Spencer at the charity event “A Time For Heroes” benefiting the Elizabeth Glaser Pediatric AIDS Foundation at the Wadsworth Theater in Westwood, Calif.

And yes, her Hills nemesis Lauren Conrad was there too!

25+ pictures inside of Heidi & Spencer’s beach romp… More Here! »

Wow, now we’ve got paparazzi filming other paparazzi!!

Video/audio footage has surfaced of photographers talking about their paparazzi agency’s “set up” that they did with America’s favorite couple Heidi Montag and Spencer Pratt from The Hills.

Heidi and Spencer, as first reported by Celebrity Babylon, have reportedly racked up a cool $30,000 for staging photos and their engagement for a double-page spread in a certain tabloid magazine.

“It’s an arrangement that suits both of them,” says an MTV insider. “They won’t be walking down the aisle, they will go through the motions of planning a wedding, and then have a big break-up that will get lots of press. All caught on camera by photographers, of course.”

Says Celebrity Babylon, “It’s a manager with a contract in hand, the dirtiest deal in Hollywood, the romance is a publicity stunt to make the two cover-worthy magazine stars and generate a significant side income!” Watch the video here!

20+ pictures inside of Heidi and Spencer working out, dining, and doing laundry together in Los Angeles two days after their “engagement” was announced. More Here! »

Lauren Conrad stayed a safe distance away when co-stars Heidi Montag and Spencer Pratt came stomping onto the red carpet.

The Hills‘ resident dysfunctional love unit did stop to speak with Just Jared on the red carpet at the 2007 MTV Movie Awards, though. The engaged couple (they wouldn’t confirm their relationship status) chatted up Heidi’s future music career and what we can expect from the new season of The Hills.

Heidi on visiting JustJared.com: I think I just saw your website the other day! (laughs) I think I diiiiiiid!

On her red carpet outfit: It’s just from a small boutique from Green Tea and I’m wearing Jimmy Choos [heels].

On the third season of The Hills: It’s going to be crazy with a lot of unexpected things — relationships, friendships, everything. Pretty exciting! The best season ever — way better than last season I’m sure.

On not wearing her engagement ring: What engagement ring? You’re gonna just have to watch The Hills!

On who she’s looking forward to seeing at the Awards Show: Sarah Silverman. I hope Jimmy Kimmel comes out. They’re our favorite people. We like funny people.

On her upcoming album: I’m doing it with David Foster under 143 Warner and it’s going to be very pop, emulating Britney Spears and Pussycat Dolls. That kind of sound — very sexy but young and fresh.

On her readiness to whip out her dance moves: I’ve been waiting my whole life! I’m ready!! (Spencer: “She was born to be a pop star!”)

On her musical inspirations: Madonna, Britney Spears… back when she was getting started, and Michael Jackson. … The album’s coming out this fall.

On her many music video ideas: I have a million, but I can’t talk about it. (laughs) That’s my favorite part, I’m so excited for that!

On her writing songs for the album: “I’m not finished with the album but I have written a little bit of it.” (Spencer: We’ll see which songs make the cut but Heidi’s been writing at least half of the songs so far.)

On her relationship with former roommate Lauren Conrad: You’re going to have to watch The Hills but you know, obviously, we walk the red carpet differently, but you know, we’re friends. We’ll have to see.

Spencer on Lindsay Lohan’s DUI incident: I think it is terrible that these girls are the role models for millions of girls growing up around the world, not even just America.. They need to wake up and it’s not just their lives. There are so many impressionable youths that are looking up to them like, ‘Oh, that’s so cool to get a DUI.’ It’s like the new thing. It’s like no, it’s terrible. People should be drinking their water, be healthy. And I feel bad for her.

Spencer on the fairness of Paris going to prison: I took down the Free Paris campaign down [from my MySpace] once she acknowledged that she should have been in jail. I just thought it was 23 days and they were trying to make an example of her. At the end of day, she was just a normal citizen and she should be punished.

Spencer on this blog: So Just Jared.com? Are you going to blow Perez out of the water? Anytime you need it, here, grab my cell phone in case you guys ever want to do something. I love digital media. It’s the future. (scribbles cell phone number on my paper pad) Call me. Anytime.

More Here! »