Chelsea Handler - known to bare her breasts on any occasion she deems suitable - has a reason behind unclipping her bra and "freeing her nipples."

The 40-year-old comedienne underwent a breast lift six months ago, an insider told Us Weekly.

The former E! host was "stressed about looking saggy," and listed that concern as her reason for having the surgery.

Handler took the time to research doctors who would do the best work with minimal scarring and she is thrilled with her results.

She seems more than proud of her now-bouncy bosom, as many of us have seen on social media.

Handler is a firm believer in expressing oneself, but that doesn't always mean verbally. The star is known for posting topless selfies on her Instagram, and her friends and other celebs never know when she's just going to whip them out.

On Feb. 25, in celebration of Handler's 40th birthday, fellow comedienne Whitney Cummings posted a nude picture in which her face was smashed up against Handler's breasts.

E! Online listed 14 times (at least) in which Handler sported her birthday suit around town.

"She is obsessed, so she keeps posting," the source explained.