While nursing Harlow, now 3, in 2008, Nicole Richie said, "I really don't like [having big boobs]." Times sure have changed!
An insider tells the new issue of Us Weekly that the "Fashion Star" mentor got implants this summer.
PHOTOS: Nicole's wild-to-mild transformation
"In the past, she said she wanted a lift, though we never thought she was serious," another source says of Richie.
PHOTOS: Can you guess the bra sizes of your fave celebs?
Still, "she's been open about it to friends," notes the first insider.
Richie flaunted her fuller physique while vacationing with pals in Mexico on Sept. 24. It's a stark contrast to the flat-chested bikini body she showed off just one year earlier.
PHOTOS: Plastic surgery nightmares
The second source adds that the House of Harlow 1960 designer wanted to improve her bustline for hubby Joel Madden, 32. "The pregnancies took a toll. She said breast-feeding killed what boobs she did have!"
MORE FROM WONDERWALL:
Nicole Richie Turns 30
Jessica and Honor Head to School, Plus More Celebritots
30 Stylish Ladies
Joe Manganiello parties with new love Sofia Vergara and her family in Miami on today's Celebs Gone Social.
It's been 20 years since "Jurassic Park" came out. See what the cast of the movie is up to these days.
Selena Gomez, Zoe Saldana, and Maggie Gyllenhaal all get an F on this week's Fashion Offenders.
Check out some of January Jones' most retro wardrobe choices from over the years.
Get the scoop on Naya Rivera's wacky wedding on Replay hosted by Wonderwall's Kirby Kristen.
Find out which stars attended Jennifer Lopez's birthday celebration on today's Celebs Gone Social.
© 2014 Microsoft