"It's awful," Gomez tells Ellen DeGeneres in an interview set to run on her talk show Wednesday. "You let it go down and it coats your throat. I gag every time."
So where did Gomez, 18, learn the trick? From Kelly Clarkson – though the two haven't actually met in person.
"I read it in an interview," she says, "so, I just copied her."
"So, you know it's true," DeGeneres responds, joking. "Everything you read in a magazine is true."
Another thing that's not true: any talk of a possible romance with fellow teen pop star Justin Bieber, who, at 16, is two years her junior.
"What? Oh brother," Gomez, who's been involved with Nick Jonas off and on for a couple of years, says. "He's little. He's like my little brother. That's weird to me."
"You're a cute couple," DeGeneres teases back. "I'm just saying."