It's definitely a battle of the booties in Hollywood. Jennifer Lopez wants to hold onto her title of the past decade. Nicki Minaj doesn't wanna lose to Iggy Azalea... so what do they do?! They show em off on their single cover art, duh!

So... comparing that to Nicki Minaj's "Anaconda" art, and Kim's bajillion butt selfies... who does it better?!