Happy Birthday, Katy Perry!

The international pop star, who is known just as much for singing to her California Girls as she is for her famous curves, turns 27-years-old today.

Currently, Katy Perry is back in the UK after biking around NYC with her husband, comedian Russell Brand, and celebrating their one year wedding anniversary, reports the Daily Mail. 

She and her husband own a $2.7 million apartment in TriBeca, New York.

The couople even went down to support the Occupy Wall Street folks, with Russell Simmons.

She performed in Belfast on Oct. 24, the eve of her birthday, in a blue, pink, and yellow bubble suit for the international leg of her California Dreams tour.

Perry continued the parade of glamorous, crazy costumes with a peacock ensemble and gold two piece.

The curvaceous cutie has been sporting pink hair these days as well.

Katy Perry (@KatyPerry) tweeted: Thanks for the sweet B-day messages! For my b-day I have set up a donation page @ http://www.aspca.org/katyperry The voice for ANIMALS! Give if u can!