Katy Perry perhaps took a page from her frenemy Taylor Swift's book and attempted to trademark the iconic Left Shark from her 2015 Super Bowl performance -- only she was denied.
Taylor Swift recently sat down for an in-depth interview, where she discussed everything from her incredible relationship with her fans and why she won't talk about Katy Perry.
After a powerful message from both President Barack Obama and a domestic abuse survivor, Katy Perry delivered an emotional performance of 'By the Grace of God' at the 2015 Grammy Awards.
John Mayer guest-hosted 'The Late Late Show' last night (Feb. 4), and of course, he couldn't resist gushing about Katy Perry's epic Super Bowl performance.
Katy Perry showed the world that she is, indeed, a "firework" as she lit up the University of Phoenix Stadium during the 49th Super Bowl halftime show in front of millions of viewers worldwide.