Heidi Montag turns 24 today, and boy has she changed since she was introduced to the world on The Hills in 2006! A lot has happened in the past year for the reality star, including the debut of her new body after 10 more plastic surgery procedures, which she has shown off a number of times. Even before her second time under the knife, she hasn't been shy about flaunting her assets — check out Heidi's bikini body through the years!
Bikinis, Boobs, and Butts: Happy 24th Birthday Heidi Montag!
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