Katy Perry is no stranger to being an online punching bag, but during the opening night of her Lifetimes tour in the U.S.

Katy Perry called out the haters who are currently mocking her over-enunciating voice in her 2008 ballad 'Thinking of You' ...

Katy Perry is getting futuristic on her new Lifetimes tour, which kicked off its North American run May 7 in Houston. Here ...

Carrie Underwood took a thinly veiled dig at the former "American Idol" judge Katy Perry after she travelled to space.