katy perry, "birthday" chameleon

how many katy's can you spot in her new video?!

After dropping lyric videos and teasers, Katy Perry's "Birthday" video--the whole thing--is finally here! And, um, there are SO many Katy's packed into this one clip.

Where else can you see Katy Perry as a drunk clown, as an old lady, as a princess, and as an annoying MC? Nowhere, which is exactly why you need to block off the next eight minutes and watch the entire video here. Then, keep the party rolling with our ultimate Birthday Checklist. Because even if it's not your real birthday, it's never too early to start planning...right?