Birthday girl Heidi Montag‘s drastic transformation may be nine months old, but on the 25th anniversary of her birth we could think of no more appropriate way to celebrate the constantly evolving starlet’s special day than to reminisce over her appearance old and new.
From the Colorado native’s fresh-faced days on The Hills to obtaining some big ol’ hills of her own, Heidi’s transformation to life-sized doll is nearly complete. Montag claims to regret some of the work she’s had done, but we have a feeling this spotlight addict’s makeover is hardly finito. Here are 25 photos dating back to 2006 documenting Heidi’s journey from Plain Jane to Playboy covergirl. [Photos: Getty Images]