WASHINGTON--First Lady Michelle Obama hits Los Angeles on Saturday for Nickelodeon's Kid's Choice Awards, where she will present an award to teen singing star Taylor Swift and highlight her own work to combat childhood obesity. Mrs. Obama is traveling on a government--political--vacation swing with daughters Malia, 13 and Sasha, 10--who fit right in the Nickelodeon demographic.

Will Smith is hosting the 2012 Kids' Choice Awards. Mrs Obama presents "The Big Help Award" to Swift "for her work with tornado and flood survivors," the White House said.

More from the White House: "As part of her initiative to solve the problem of childhood obesity, the First Lady's Let's Move! initiative and Nickelodeon have teamed up to get kids moving by turning off the television for three hours during Nickelodeon's Worldwide Day of Play. As part of her Joining Forces initiative to recognize, honor and serve military families, Mrs. Obama joined the cast of Nickelodeon's hit series iCarly in the episode, "iMeet The First Lady." The show's lead character, Carly Shay is the daughter of an Air Force Colonel currently serving overseas."