It says no autotune, but anyone with an ear for it can tell that Katy's been using an autotune rack for her live performances since the early Teenage Dream era. It's not a shameful thing. It's just the way some of her notes transition, it's quite easy to spot when comparing her live vocals to the One of the Boys era live performances. I'm a Katy stan, but most pop artists use autotune for live performances, and it's not even a recent phenomenon. Shania Twain did it back in 2003. It's just frustrating when people put videos claiming they aren't. It's a given, technology has evolved and it's just a part of the game now,
Nicki tho 
that's actually shocking, wow.
but who is shocked? Her live vocals are always a mess.