Booticious: J.Lo and Rihanna at the iHeart Music Awards

Jennifer Lopez and Rihanna posed butt-to butt and compared the booties at the back stage at the iHeartRadio Music Awards on Thursday  May 1^st in L.A.

Rihanna received an award for song of the year for "Stay" at the iHeartRadio Music Awards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles. 

Shakira performed at the iHeartRadio Music Awards.