04/16/2009 05:12 am ET | Updated May 25, 2011

Beyonce On The Obama Girls & Being Curvy

Beyonce graces the April cover of Vogue magazine.

Inside, she remains fairly mum on her marriage to Jay-Z but talks movies, music and singing at the inauguration for the Obamas' first dance:

A few days later, Beyoncé tells me, she called Michelle Obama to thank her for the opportunity. "She told me she was very happy that her girls have someone like me to look up to," says Beyoncé. "And I'm like, 'Oh, my God.' You have to feel fortunate to be one of the people whom parents don't mind their children looking up to. The older I get, the more I think about the amount of influence I have on these young girls, and it's scary sometimes. But I also understand how lucky I am to have that."

President Obama was even caught showing off his Beyonce hand flip dance move at the inaugural concert

She also talked about her famous figure, after her "Cadillac Records" director said how agreeable she was to gain weight for her role as Etta James:

Martin asked Beyoncé if she could gain 20 pounds, and was "shocked" that she agreed. But transforming her body is something Beyoncé has done before. To play Dreamgirls's Deena Jones, she did a lemonade fast for thirteen days and then adhered to a strict diet-and-exercise regimen during a long shooting schedule. Gaining weight, she says, was more fun. "I ate a lot of butter-pecan ice cream," she admits. "But it's easy for me to gain weight. I'm not a naturally stick-thin girl. I'm not heavy, but I'm not skinny, either."

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