Listen: Katy Perry's 'Birthday'

How savvy is this? Make a song that says, "Happy Birthday!" in a vibrant and non-corny way and let it "leak" so that it will now populate every birthday fest on the globe. As Billboard notes, after listening to Prism, set to be released next Tuesday, Oct. 22, "Birthday" "leapt out of the new batch of songs as the one with the most potential to become a smash. We see commercials, and TV shows, and movies, and, well, you know, the possibilities are endless. She also tweeted birthday wishes to her main squeeze John Mayer today.

happy birthday cutie!!!

So kinda perfect timing, right?
ENJOY!
[H/T BriceSander.tumblr]