Sorry, Sharon Osbourne: Lady Gaga says it's her papa's pizza from the oven that's caused her to gain 25 pounds. The implication? There's no bun in the oven.

"I love eating pizza and pasta," Gaga told radio host Elvis Duran. "I'm a New York Italian girl. That's why I have been staying out of New York. My father (Joe Germanotta) opened a restaurant (Joanne Trattoria). It's so amazing. ... It's so freaking delicious, but I'm telling you, I gain 5 pounds every time I go in there. So my dad wants me to eat at the restaurant, and I'm, like, 'I've got to go where I can drink green juice.'"

On Thursday's The Talk, Osbourne speculated that Gaga's curvier look of late comes courtesy of conception. "That's what I think. The face, the arms, the upper thighs. I think that she is pregnant." She added, "I know nothing, but just my instincts are telling me: preggers!"

Gaga told Duran she's currently dieting while on tour abroad. "And you know I really don't feel bad about it, not even for a second. I have to be on such a strict diet constantly. It's hard because it's a quite vigorous show, so I tend to bulk up, get muscular, and I really don't like that. So I'm trying to find a new balance."

USA Today