We're thrilled for her!

Shannen Doherty announced she had completed her radiation treatment for breast cancer last Friday, and when we caught her out in Malibu this afternoon, we couldn't believe our eyes! The actress already looks stronger and healthier, and we couldn't have more respect for the way she fought her health battle.

The 90210 star's hair is growing back at a rapid rate, and we just know she'll be back to her old self in no time! We think part of her quick bounce back is due to the fact she maintained such a positive outlook throughout the very difficult period. Case in point? The below video of her busting a move in dance class to get her energy up.

We're in total awe of this cancer slayer!