PHOTO GALLERY: Kristin Cavallari’s Beach Workout

The secret to the perfect bikini body? Sunny Malibu beach and a film crew, of course!

Kristin Cavallari filmed some workout scenes for The Hills on the beach in Malibu on Thursday.

The actress, who recently apologized for creating Speidi, went through an intense fitness routine with the help of a rubber ball.

Who knew working out could look so cute?