Heidi Montag: Liquid Bikini Babe!

Heidi Montag puts her breast foot forward while hosting the grand opening at the Liquid Pool at Aria at CityCenter on Saturday (April 10) in Las Vegas.

The 23-year-old Hills star showed off her assets poolside with a teeny-bikini!

Heidi and husband Spencer Pratt recently stopped by Camp Pendleton in San Diego to tour the base and raise the spirits of the Marines. The pair told People, “We went to visit Camp Pendleton to see the Marines. They’re the most valiant, honorable and courageous men and women in the United States. It was one of the best days of our lives!”

FYI: Heidi designed her own bikini!

20+ pictures inside of Heidi Montag putting her breast foot forward…