Which Celeb Is Squeezed Into a Sparkly Bra?

Think you know what star has spangly cleavage?

That can't be comfortable!

During her performance at a music fest across the pond, this singer stuffed her enviable assets into a spangled bra before taking the stage.

While the itty-bitty top certainly commands attention, it looks like maybe she should have gotten a bigger size.

Think you know who squeezed into the sparkly bra? Find out after the jump...

It's Katy Perry, onstage at the V Festival in Hylands Park, outside of London.

What do you think of her look?