A purple Katy Perry and pants-less Miley Cyrus at Billboard Awards

Katy Perry wore a puruple Blumarine dress that matched her purple-hued hair at the 2012 Billboard Music Awards on May 20. The 27 year-old accessorized her look with five Misaki spike bangles.

Is Miley Cyrus taking fashion advice from Christina Aguilera? The singer left her pants at home and wore this daring Jean Paul Gaultier jacket that shows off plenty of cleavage! The 19 year-old finished off her Billboard Music Award look with Christian Louboutin heels. (WENN)