PHOTO: Did Nicole Richie Get a Boob Job?

The former reality star flaunts a noticeably larger bust in bikini photos snapped while she was vacationing in Mexico on Sept. 24

Did Nicole Richie give herself a couple of 30th birthday presents? Thanks to photos (like the one to the above right) of the new, fuller figure she flaunted while on vacation in Mexico on Sept. 24, the media is speculating that Richie might have marked her Sept. 21 birthday with a celebration of the breast augmentation persuasion.

Richie herself has not confirmed this, of course, but an "inside source" tells Us Weekly that Nicole got the implants over the summer. "She's been open about (the boob job) to friends," says the pal.

"In the past, she said she wanted a lift, though we never thought she was serious," adds another insider.

Ever since Richie dropped all that weight in 2006, her figure has been trim all over -- especially on top. According to one Us source, Richie wasn't satisfied with her bust after two pregnancies -- she has daughter Harlow, 3, and son Sparrow, 2 -- and wanted her chest to look nicer for her husband, musician Joel Madden.

"The pregnancies took a toll," says the insider. "She said breast-feeding killed what boobs she did have!"

Back in 2008, while she was nursing Harlow, Richie didn't seem to care much about her breast size, however. "I really don't like (having big boobs)," she said at the time.

So, did Richie change her mind about the importance of a large chest and choose to celebrate her milestone 30th birthday with a boob job? When you compare the bikini photos above -- the one on the left is from 2006, and the one to the right is from Sept. 24 -- it sure seems that way. But until Nicole confirms the news, we'll just have to stay abreast of the situation.

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