Top 10 Scandalous Stars Under 30

First Miley Cyrus grew up too fast for her own good.

Now Hayden Panettiere is shooting racy ads and Brooke Hogan may be about to pose for Playboy. And don’t forget Sienna Miller’s topless adventures!

What will this young Hollywood brood reveal next? Countdown the top ten scandalous stars under the age of 30, from least to most promiscuous!