Happy birthday, Katrina! She celebrated her 21st partying at LIV Nightclub, and by taking a dip in the ocean in Miami. I don't know about you, but these pics sure make us want to hit the elliptical.
This post has not been vetted or endorsed by BuzzFeed's editorial staff. BuzzFeed Community is a place where anyone can create a post or quiz.
Learn more or
post your buzz!
This post was created by a member of the BuzzFeed Community.
You can join and make your own posts and quizzes.