What better way to endorse a product by having a celebrity athlete to do it for you? From tennis players to runners to dancers and volley ball players and skiers, here are some of the sexiest endorsements these athletes have put their name to. It's hard not to find these products extremely sexy after this. It works!

1. Allyson Felix

Modeling for Nike.

2. Sofia Boutella

Modeling for Nike.

3. Maria Sharapova

Modeling for Tag Heuer and Nike

4. Anna Kournikova

Modeling for Shock Absorber Bras

5. Serena Williams

Modeling for Nike.

6. Lindsey Vonn

Modeling for Under Armour and Red Bull

7. Erica Hosseini

Modeling for Oakley

8. Hope Solo

Modeling for Nike

9. Dara Torres

Modeling for Milk

10. Julia Mancuso

Modeling for Lange

11. Amanda Beard

Modeling for Speedo.

12. Kerri Walsh-Jennings

Modeling for Designer Whey