Rihanna horse riding on the beach in Barbados. Picture: Splash
"Horseback riding on the beach and thru the Mexican jungle!" Picture: Twitter
Justin Bieber spends his Monday horseback riding with his entourage in Burbank. Picture: AKM-GSI/Splash
Prince William pictured taking part in a charity polo match at Cirencester Park Polo Club.
Prince Harry playing polo
Prince William and Harry play in a polo match watched by their girlfriends Kate Middleton and Chelsy Davy at Coworth Park near Windsor, England. Pic: PA Photos