Miss "Teenage Dream" Katy Perry turns 28 today!
Known as well for her songs as she is for her ever-changing hair colors and often outlandish outfits, in honor of the pop star's big day we decided to focus on one specific aspect of her unique wardrobe choices -- her crazy cleavage looks!
The California girl performed at a campaign rally for President Obama in Las Vegas on Wednesday, where she clothed herself in a voting ballot dress -- with the Obama / Biden box checked off, naturally.
Over the years, Katy's donned all sorts of crazy gear to cover her lady parts, film reels to candy, and even an appearance by Elmo!
Click "Launch Gallery" above to see all of Katy's craziest cleavage looks ... and Happy Birthday!