The singer has a hoppy time performing for the First Family at the White House Easter Egg Roll. Plus: Ashlee Simpson-Wentz, Matthew McConaughey and more

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BUNNY BUSINESS

Fergie hops to the mic to sing the national anthem – with the Easter Bunny by her side! – Monday at the White House Easter Egg Roll. The singer also performed several of her hits, including "Big Girls Don't Cry," for the First Family. "It was a special moment in time as I got to see Michelle, Malia and Sasha dancing and singing with me to my songs," Fergie told PEOPLE.