The Billboard Music Awards took over Las Vegas last night as the celebs rocked it on the carpet and on the stage. However, there were more than a few music stars who just missed the mark when it came to the fashion.

From the barely there gowns to the colorful messes that caught everyone’s eye, and not in a good way.

The Billboard Music Awards fashion is usually something to praise, however this year things took a turn for worse. These lucky celebrities top our list of biggest fashion fails from the billboard music awards.

Mariah Carey chose to show it off in a cleavage baring illusion dress.

Hailee Steinfeld’s embraced her girly side in a black and white ruffle number.

The whole Fifth Harmony clan completely failed in their black, white and yellow matching outfits.

Britney Spears covered it all up in an ill-fitting, long, sparkly gown.

And Dencia’s outfit was a messy rainbow that had everyone staring.

It seems like some of the stars got dressed in the dark or just completely forgot to look in the mirror before stepping out on the red carpet.