<Ul> <Li> "Roar" (Katy Perry) </Li> <Li> "Dark Horse" (Katy Perry) </Li> <Li> "I Kissed a Girl" (Lenny Kravitz and Katy Perry) </Li> <Li> "Teenage Dream" (Katy Perry) </Li> <Li> "California Gurls" (Katy Perry) </Li> <Li> "Get Ur Freak On" (Missy Elliott and Katy Perry) </Li> <Li> "Work It" (Missy Elliott and Katy Perry) </Li> <Li> "Lose Control" (Missy Elliott) </Li> <Li> "Firework" (Katy Perry) </Li> </Ul> <Li> "Roar" (Katy Perry) </Li> <Li> "Dark Horse" (Katy Perry) </Li> <Li> "I Kissed a Girl" (Lenny Kravitz and Katy Perry) </Li>

Who has performed halftime at the super bowl