In the Jan. 15, 2014 episode of American Idol, a contestant sang Roar for his audition, and made it to Hollywood. One of the few times I've seen someone successfully sing a Katy Perry song on one of these shows.
In the Jan. 16, 2014 episode, at one point in the episode, they played Roar as background music. At another point, they played This is How We Do as background music. That was surprising, since that hasn't been released as a single yet, and I thought that song was pretty obscure so far (unless you own the Prism album, I'm not sure where people would have heard it). Another guy sang Roar for his audition, but he was really bad!