Katy Perry was recently on BBC's Radio 1 Live Lounge where she performed a cover of Jay-Z and Kanye West's "Ni**as In Paris." These are my real time reactions:

00:06: "Oh, no."
00:19: "Why?"
00:40: "I don't hate this?"
01:03: "Wait, yes, I do."
01:32: "I'm so glad no one knows about the time I started crying while listening to 'Firework' at the grocery store."
02:02: "I should do this at karaoke sometime."
02:02:01: "No, I should not.
02:20: "KP is committed."
03:00: "This is...okay."
03:20: "Shit. I think I am liking this."
03:37: Upon hearing the host call Katy Perry "K-Pez," I vomit all over myself.
03:38: I am covered in throw up.
03:42: I fall into a panic blackout.
2 weeks later: I come to at the feet of the Lincoln Memorial, wearing only deer pelts and an Anonymous mask.

And Here Is Katy Perry's Cover of ‘N*ggas in Paris' [Vulture]