Katy Perry 'Prism' [FULL ALBUM STREAM]

It's finally here. Katy Perry's new album Prism is available to stream in full.

Check out the FULL ALBUM STREAM of Katy Perry's Prism here (and if you're short on time, read over my song-by-song breakdown to decide which tracks tou want to listen to).

In addition to the album stream, the winner of Katy Perry's "Roar" contest will be announced today on Good Morning America. High schools submitted music videos to the official contest with the hopes of winning a concert from Perry herself. Check out the five finalists here and stick with Mstars for news of the winning school.

Strangely, when Katy went on SiriusXM to promote Prism, all she could seem to talk about was another pop diva. Perry big-upped Ariana Grande throughout her interview.

"I love her. I think she has the best female vocal in pop music today," Katy said. "She has literally the best voice, the best voice live. She kills it. She's so good."

(I mean all of that is true. But still, it is interesting. Maybe when you are a big enough name that your album release is news in itself, you don't feel the need to talk up your own work?)

What do you guys think of Prism? Sound off in the comments.