That's so weird that an ex-producer would say that about her. I guess he felt like she sold out or something. The tracks he produced are very old, so I guess he can feel however he wants about Katy.
Ariana Grande has already confirmed she won't be following in Britney's footsteps by performing with a snake but as well as making her big debut in the VMA pre-show, she's very excited to see two certain feuding divas.
"I'm so excited to see Katy [Perry]. I love her new single so much. 'Roar' is everything. I love it. It came out and I did not stop playing it on repeat. So I'm very excited to see Katy," she told MTV.