Jennifer Lopez [1] made an appearance on the Billboard Music Awards red carpet [2] right before she took the stage for a performance, and while her costumes always stun [3], we were more than blown away by her Roberto Cavalli oxblood ensemble, consisting of a crocodile-effect bra and cardigan come undone, slitted skirt, and thigh-high Casadei boots with a pin-thin high heel. Jennifer completed her outfit with stunning jewels from Yeprem and AS29, and a matching Devi Kroell box clutch to achieve one of the sultriest looks [4] we've ever seen her in. Read on for an all-angles view.