"This is how far I go when I'm taste-testing my products," she told ET's Nischelle Turner on the red carpet, before mistakenly saying her husband's show, Blue Bloods, instead of her vodka brand, Blondies, that is coming out with a blueberry flavor.
McCarthy showed off her curves in a black sequin Tom Ford gown with a sheer top. She paired the sparkling dress with sheer black gloves and bedazzled rose gold aviators.
The SiriusXM radio host also joked to ET about deciding to ditch her Spanx, saying, "I am sucking in my stomach so hard right now," while Wahlberg gushed about his gorgeous wife, exclaiming, "Damn, I'm a lucky man," when he saw her.
For more wild looks from the GRAMMYs red carpet, click below.
The GRAMMYs, hosted by James Corden, will air Sunday, Jan. 28, at 7:30 p.m. ET on CBS.