When it's time to work out, Hollywood's leading ladies are stepping off the stationary bike and into the boxing ring.
Check out 13 total knockouts who know a thing or two about knocking you out!
13. Shay Mitchell
12.Ellie Goulding
11. Padma Lakshmi
10. Angela Simmons
9. Mandy Moore
8. Adriana Lima
7. Karrueche Tran
6. Minka Kelly
5. Odette Annable
4. Brandy
3. Claire Holt
2. Gigi Hadid
1. Izabel Goulart
