Guest Stars Carrie Underwood as Herself Scotty McCreery as Himself Lauren Alaina as Herself Lady Gaga as Herself Haley Reinhart as Herself Steven Tyler as Himself Jennifer Lopez as Herself Beyoncé Knowles as Herself (Beyoncé) Tony Bennett as Himself Sheila E. as Herself TLC as Themselves Tim McGraw as Himself Jack Black as Himself Reeve Carney as Himself Tom Jones as Himself Bono as Himself Marc Anthony as Himself Lil' Jon as Himself The Edge as Himself
