Katy Perry mixed athleisure and lingerie while performing at the opening ceremony of the Invictus Games on Feb. 8.

There's costume changes, there's acts, there's dancers, there's musicians. I'll fly around the room. There's no bad seat in the house," Perry teases. "I'm going to get close to everyone at some point.

Katy Perry is hot on the heels of her first headlining concert tour in seven years, The Lifetimes Tour, in support of her ...

Perhaps most notably, singer Katy Perry stole the show with her transformation. A video on Twitter shows Perry really going for it on the dancefloor while wearing a lettuce dress. This is because ...