Kelly Clarkson @ ACMs 2007 Rehearsals

Kelly Clarkson takes a break with Reba McEntire and Rascal Flatts frontman Gary LeVox at the rehearsals for the Academy of Country Music Awards 2007 at the MGM Grand Garden Arena on Monday in Las Vegas, Nevada. (Jay DeMarcus and Joe Don Rooney of Rascal Flatts pictured below)

Kelly and Reba will be premiering their duet “Because Of You,” which goes to radio May 16. This track is one of the the 11 duets Reba has recorded for her duets album, out Sept. 18th.

Of note: Kelly guest-starred on the Reba show back in January.

And one last recent Kelly quote: “My label literally sent me a Lindsay Lohan track from her last album and wanted me to record it for my new album. And while I like Lindsay Lohan, like I’m cool with her and I think she sings the song well… it’s already been on an album. I don’t care what pop star it is.”

For 15+ pictures of Kelly and Reba rehearsing, CLICK HERE!