Ray Rahman
October 16, 2013 AT 05:55 PM EDT

Katy Perry wants you in your birthday suit, and she wants it now.

With less than a week left on your Prism countdown clock, the album’s very buoyant third track “Birthday” has leaked all over the place. You probably heard a slice of the song yesterday, when the Prism preview started streaming on iTunes, but now you can gorge on the whole cake. Because, you know, birthdays.

Listen to the track below, and make sure you stick around to the end for a whispered little message from Perry herself:

UPDATE: Katy Perry’s megaballad “Unconditionally” has also leaked.

Luxuriate in it below:

[soundcloud url="http://api.soundcloud.com/tracks/115606615" params="" width="100%" height="166" iframe="true" /]

And finally, read Nick Catucci’s review of the entire album!

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