Heidi Montag`s boob comes out of bikini in Costa Rica

London: Former ‘Hills’ star Heidi Montag looked vaguely horrified when one of her pneumatic breasts nearly escaped from her top as she splashed around in the Costa Rican surf.

The 25-year-old star frantically tried to keep things covered up when the bikini malfunction occurred, reports the Daily Mail.

Fortunately, she recovered enough to walk down the beach displaying her surgically enhanced figure in blue bikini top and red patterned bottoms with no further mishaps.

The slip up may have given Montag more reason to regret having made her breasts so big - she recently confessed she is already thinking of having her G cups reduced.