(Splash News/Dave Hogan/Getty Images)

Lady Gaga caused a stir in Amsterdam this week when she lit up a joint on stage during a concert. But what really caused criticism was the singer's fuller figure.

"I'm dieting right now, because I gained, like, 25 pounds," Gaga told radio host Elvis Duran. "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."

PHOTOS: LADY GAGA LIGHTS UP A JOINT

The "Born This Way" singer blamed the pounds on her love of pizza and pasta, calling herself a "New York Italian girl." She also blamed her father, Joe Germanotta's NYC Italian restaurant, Joanne Trattoria.

"My father opened a restaurant. It's so amazing . . . it's so freaking delicious, but I'm telling you I gain five pounds every time I go in there," she said. "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."

The 26-year-old singer's weight has drawn comments before. During a February Los Angeles conference hosted by Maria Shriver, the pop star admitted to having an eating disorder as a young girl. Two months later, she tweeted, "Just killed back to back spin classes. Eating a salad dreaming of a cheeseburger," with the hashtag #PopSingersDontEat. The tweet angered many of her Twitter followers.

In June, fellow singer Elton John expressed concern over Gaga's thin frame.

"She is frail, and she doesn't eat when she should, and she's a girl, and it's tougher for a girl," Elton told The Guardian. "She works really hard. She will be in Denmark one night and Saudi Arabia the next. I know how tiny she is and I do worry about her, yes."