Paris Hilton had a style scare with her Halloween costume.

At her Hollywood bash over the weekend, she dressed up as a sexy Indian warrior princess.

PHOTOS: 2010's scariest celeb costumes

But her skimpy top kept slipping down and nearly exposed more than she wanted to.

PHOTOS: Us readers share best celeb costumes

Her sister Nicky had more luck with her demure Minnie Mouse duds.

Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly