Mrs. John Legend spills on pregnancy boobs

Turns out, Chrissy Teigen's baby belly isn’t the only body part getting bigger. John Legend's wife is keeping it real when it comes to her pregnancy boobs and things get really funny.

The mom-to-be revealed she’s in no need of a DIY pushup bra during Tuesday’s episode of 'FABLife' when co-host Joe Zee demonstrated an easy how-to of doubling your cup size.

"I’m still second trimester and … I think I’m rocking a 40 double D now,” Teigen, 30, shared. “I have no idea how, but Joe, let’s double them."

READ MORE:Chrissy Teigen flaunts baby bump in sexy swimsuit

And when Zee showcased his simple hack using a black bra, the sample item took Teigen back to a time of pre-pregnancy breasts. "That’s like a nipple cover for me right now by the way,” the model joked. “My nipples are all sorts of weird," before adding, "Oh honey, that only gets worse.”

READ MORE:Kim Kardashian's massive boobs struggle to stay in dress

Teigen and husband are expecting their first child together. In December, the 'Lip Sync Battle' star revealed they will be welcoming a baby girlin the spring.