Adam Levine dropped by "The Howard Stern Show" this week, along with his girlfriend Anne V., and found himself discussing a pretty touchy subject: Christina Aguilera's weight.
"This is a sensitive subject for women, but why do you think she's gotten so heavy?" Stern asked Levine. "Is she upset? ... She used to be so f***ing hot ... And her clothes are too tight, right?"
Levine, clearly uncomfortable with where the conversation was headed, chose his words carefully when responding about his fellow coach on "The Voice."
"Her clothes are tight. She likes to wear tight clothes," Levine said. "She clearly likes to talk about being comfortable with being a woman and snapping her fingers and doing the whole thing."
Over the past year, Aguilera has received harsh criticism regarding her weight gain and her various fashion faux pas, most recently while performing at Etta James' funeral. A feud with E!'s "Fashion Police" correspondent Kelly Osbourne got downright nasty last year, when Osbourne called Aguilera a "fat bitch."
On his show, Stern wasn't going to let Levine off the hook and continued to push the subject of Aguilera's weight, saying, "Yeah, but when you're a plus-size woman, you can't wear the tight clothes anymore."
"I wouldn't go that far, actually," Levine said.
When asked what size Aguilera is, the "Voice" coach wisely responded, "I'm keeping my f***ing mouth shut."
HuffPost Entertainment is your one-stop shop for celebrity news, hilarious late-night bits, industry and awards coverage and more — sent right to your inbox six days a week. Learn more