Rihanna, however, was a bit more obvious in drawing attention to her posterior. The 26-year-old "Diamonds" songstress wore a provocative, sheer black Givenchy Couture by Riccardo Tisci dress, leaving very little to the imagination!

So who actually has the better butt? Bootyliciousness is in the eye of the beholder! Either way, both gals seemed to enjoy themselves at the event! Rihanna even nabbed the Artist of the Year award, and J.Lo couldn't have been happier for her pal! She Instagrammed a picture with Rihanna holding her award, writing, "congrats mama."

Clearly it's all love between these blessed with booty beauties!

ncG1vNJzZmivp6x7prvNpaCnnV6YvK57zZ6urGdlaIR6fJhoqaKgkaO7onnAp5tmopWju6qyxKtkpaegmsduvsihmKemkWKur7CMo5ynppmbsrN5y6innrJdpby0sYybrK2sXam8bq7Uratmq5WaerW0xGanops%3D