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.