Katy Perry joins Kids\' Choice lineup

US pop star Katy Perry is to perform live at the 25th annual Kids\' Choice Awards show, Nickelodeon said Monday. \"Katy Perry has doubly earned her position as kid favorite -- through her music, of course -- but also for reveling in an outrageous sliming on the show two years ago,\" Marjorie Cohn, president of original programming and development for Nickelodeon/MTVN Kids and Family Group and executive producer of the show, said in a statement. \"She works hard and plays hard and that\'s what makes her performance on the KCAs one to look forward to.\" Will Smith is to preside over the March 31 event at USC\'s Galen Center in Los Angeles. The ceremony, now in its 25th year, is famous for covering stars in goo as a stunt to delight its young audience. Scheduled to be presenters at the family-friendly ceremony are Chris Rock, Emma Stone, Andrew Garfield, Zac Efron, Heidi Klum, Victoria Justice, Miranda Cosgrove, Big Time Rush, Chris Colfer and Cee Lo Green.