Katy Perry, Tim Tebow, Taylor Lautner, Big Time Rush, Selena Gomez, Kristen Stewart, Victorious, LMFAO, SpongeBob SquarePants, Justin Bieber, Puss in

First Lady Michelle Obama made her first-ever appearance at Nickelodeon's Kids' Choice Awards, presenting Grammy Award-winning singer/songwriter Taylor Swift with this year's The Big Help Award in recognition of her extensive philanthropic endeavors, including her work with tornado and flood survivors in the United States. The Big Help Award recognizes individuals who take actions to better the world and whose significant impact on their community has inspired kids to do the same.