Michelle Obama defends Oscar appearance

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“It’s a part of the culture,” she added. “It’s not really about me, I just happen to be in the public eye and along with everybody else in the public eye, you’re subject to conversation, opinion and all that sort of stuff. There’s nothing new about that.”

The interview took place at a Wal-Mart in Springfield, Mo., the last stop on the first lady's multi-stop tour to promote the third anniversary of her Let's Move! anti-childhood obesity initiative.

Obama has upped her national profile in recent weeks. Besides her much-talked-about appearance at the Oscars, where she presented the "Best Motion Picture" statue to "Argo," she's done interviews with multiple media outlets and had a dance-off with Jimmy Fallon on his late-night talk show.

On Thursday, at a stop in Chicago as part of her anniversary tour, she announced an expansion of her Let's Move program to encourage more physical activity among kids.