U.S. first lady Michelle Obama speaks on stage at Nickelodeon's 25th annual Kids' Choice Awards in Los Angeles, California March 31, 2012. [Photo/Agencies]

U.S. first lady Michelle Obama (R) and singer Taylor Swift attend Nickelodeon's 25th annual Kids' Choice Awards in Los Angeles, California March 31, 2012. Obama on Saturday presented singer Swift with The Big Help award, which honors a celebrity who has devoted time and energy to charitable causes. Swift was singled out for her work to stop bullying and for providing aid to tornado victims in the southern United States. [Photo/Agencies]