

Taylor Swift accepts the award for entertainer of the year at the 47th annual Academy of Country Music Awards in Las Vegas, Nevada, April 1, 2012. Steve Marcus/Reuters
Tim McGraw (l.) and Kenny Chesney perform "Feel Like a Rock Star" at the 47th annual Academy of Country Music Awards in Las Vegas. Steve Marcus/Reuters
The members of the rock band KISS present the award for vocal group of the year to Lady Antebellum at the 47th annual Academy of Country Music Awards. Steve Marcus/Reuters
Miranda Lambert performs "Over You" at the 47th annual Academy of Country Music Awards in Las Vegas. She won the awards for album of the year for "Four the Record" and for female artist of the year. Steve Marcus/Reuters
Lady Antebellum, winner for vocal group of the year, pose backstage at the 47th annual Academy of Country Music Awards in Las Vegas. Steve Marcus/Reuters
Big Kenny (l.) and John Rich from Big & Rich pose at the 47th annual Academy of Country Music Awards. Richard Brian/Reuters
Brad Paisley performs 'Old Alabama' at the Academy of Country Music Awards in Las Vegas in 2011. Mr. Paisley won the award for Top Male Vocalist. Steve Marcus/Reuters
Charles Kelley (l.), Hillary Scott, and Dave Haywood of Lady Antebellum accept the award for Vocal Group of the Year at the Academy of Country Music Awards in Las Vegas in 2011. Steve Marcus/Reuters
Steven Tyler and Carrie Underwood perform 'Walk This Way' after singing her hit 'Undo It' together at the 46th annual Academy of Country Music Awards in Las Vegas at the 2011 award show. Steve Marcus/Reuters
A screen shows singers Jennifer Nettles of Sugarland (l.) and Rihanna performing 'California King Bed' at an offsite location at the Academy of Country Music Awards in Las Vegas in 2011. Sugarland won the award for Top Vocal Duo. Steve Marcus/Reuters
Miranda Lambert accepts the Top Female Vocalist award at the Academy of Country Music Awards in Las Vegas at the 2011 awards. Steve Marcus/Reuters
Taylor Swift (l.) performs 'Mean' at the Academy of Country Music Awards in Las Vegas in 2011. Ms. Swift won the award for Entertainer of the Year, the youngest artist ever to do so. Steve Marcus/Reuters
The Band Perry pose with their award for Top New Artist at the Academy of Country Music Awards in Las Vegas in 2011. Sam Morris/Reuters
Zac Brown (l.) and James Taylor perform a medley at the Academy of Country Music Awards in Las Vegas at the 2011 award show. The Zac Brown Band and Alan Jackson won the award for Vocal Event of the Year for 'As She's Walking Away.' Steve Marcus/Reuters
Brad Paisley (third left) and members of the music group Alabama perform at the Academy of Country Music Awards in Las Vegas on in 2011. Julie Jacobson/AP
Reba McEntire performs 'When Love Gets a Hold of You' at the Academy of Country Music Awards in Las Vegas in 2011. Steve Marcus/Reuters
Robert Pattinson and Reese Witherspoon present the award for Top Female Vocalist to Miranda Lambert at the Academy of Country Music Awards in Las Vegas at the 2011 show. Julie Jacobson/AP
Ronnie Dunn performs at the Academy of Country Music Awards in Las Vegas at the 2011 awards. Julie Jacobson/AP
Darius Rucker and members of the ACM Lifting Lives music camp perform at the Academy of Country Music Awards in Las Vegas in 2011. Julie Jacobson/AP
Sara Evans performs 'A Little Bit Stronger' at the Academy of Country Music Awards in Las Vegas in 2011. Steve Marcus/Reuters
Blake Shelton performs 'Honey Bee' at the Academy of Country Music Awards in Las Vegas in 2011. Steve Marcus/Reuters
Jason Aldean performs 'Dirt Road Anthem' at the Academy of Country Music Awards in Las Vegas in 2011. Steve Marcus/Reuters
Wynonna Judd (l.), and Noami Judd are seen on stage at the Academy of Country Music Awards in Las Vegas in 2011. Julie Jacobson/AP