The celebrities hit the red carpet at the 2015 Billboard Music Awards. Click through RadarOnline.com's gallery of photos to see which stars shined — and whose looks fell flat.
Best: Taylor Swift is on the up-and-up. Between debuting the explosive new music video for her hit single Bad Blood and getting congratulatory kisses from rumored boyfriend Calvin Harris, this pop star knows how to flaunt herself just right. She opted for a classy jumpsuit that showed off her long legs.
Worst: Britney Spears missed the mark this year in a less-than desirable beaded gown, followed by a mesh performance outfit that underwhelmed as well.
Wackiest: Iggy Azelia certainly knows how to shock! The hip-hop star – who surprisingly won best rap artist of the year – showed up in a tacky baby blue crop-top and mini skirt for the red carpet.
Worst: Charlie XCX continues her bad fashion streak, sporting a lackluster black gown that didn't quite flatter her figure.
Wackiest: Dencia opted for perhaps the most bizarre outfit, wearing a jumpsuit that seemed to conjure ghosts of Andy Warhol's past.
Best: Laverne Cox is forever the class-act in a beautifully bejeweled mini-dress.
Worst: Poor Chrissy Teigen can't quite put her finger on a solid awards show outfit. The model donned a strange striped jumpsuit reminiscent of a circus performer.
Wackiest: Are any words necessary for Karen Fairchild's leather number?
Best: Jennifer Lopez stunned – yet again – in a nearly nude glitter gown.
Worst: Hailee Steinfeld confused the world in an oh-so boring Givenchy black-and-white ruffled dress.