A whole lot of crazy here: The band Fifth Harmony wore yellow, black and white, but not all their dresses made the grade
Though Iggy's figure looked stunning (thanks in part to her recent breast enhancement), the 24-year-old's two piece outfit was not as elegant as it should have been.
With a low cut bra top and a semi sheer mini skirt, the look was too risqué.
Not the right colors: Dencia (left) wore an outfit that looked like Skittles had exploded on it
Singer Dencia, 27, went with a wildly colorful dress.
It looked as if beads had been sewn into black mesh, only they were very varied and oversized. Some were orange, red, blue and yellow. It was as if packages of Skittles had burst onto her dress.
Her shoes were also different - she had on one pink platform and the other light blue.
Hot mess: Britney Spears almost pulled off this tight gown but in places it looked wrinkled and as if the shell underneath was out of place
Britney Spears, 33, almost pulled off this tight gown but in places it looked wrinkled and as if the shell underneath was out of place.
Her blonde locks looks polished and she seemed in great spirits as she joined Iggy.
Miss America 2015 Kira Kazantsev, 23, had on an awkward gold dress with a yellow trim. Long gold earrings and a cool updo made up for it though.
This yellow is not mellow: Miss America 2015 Kira Kazantsev had on an awkward gold dress with a yellow trim
Black but not basic: Singer Karen Fairchild of music group Little Big Town (left) had on boots that should have stayed at home while Mariah Carey (right) wore an uneven hem that didn't quite work, though her curves looks nice
At one point she wore a blue and orange visor over her face.
The beauty had perfect makeup however and a nice long braid worn on top.
Singer Karen Fairchild of music group Little Big Town had on boots that should have stayed at home.
Mariah Carey, 45, wore an uneven hem that didn't quite work, though her curves looks nice. The single singer's cleavage should have gotten an award all their own.
Not half bad, but not half good either: The leggy Grammy winner showed off her body in this sheer and chain dress on stage
But the Charlie's Angels hair is epic: The mother of two had her blonde locks styled with nice curls that looked Seventies
Though Chrissy Teigen, 29, won points for trying something different, it's not really clear if this jumpsuit works. She wore several other looks for the night as she was a host.
Zendaya, 18, deserves credit for being creative with her three-piece wonder. But it may have been a bit too ambitious especially with the gold stars on the front of her belt line.
Hailee Steinfeld, 18, is such a talented teen it's hard to knock her Billboard outfit, but the get up was unusual. Black boots looked edgy but maybe too extreme.
On the fence: Though host Chrissy Teigen won points for trying something different, it's not really clear if this jumpsuit works
Too much?: Zendaya won points for being creative with her three piece wonder. But it may have been a bit too ambitious especially with the gold stars on the front of her belt line
Good but certainly different: Hailee Steinfeld is such a talented teen it's hard to knock her Billboard outfit, but the get up was unusual