Whether she’s hollering her hits on stage, vamping it up for photographers or ducking out for a coffee (OK, maybe not then) – Katy is a major fan of drawing attention to her, erm, ample assets in crazily creative ways.
Through the years, we've seen Katy's boobs transform into Hershey's Kisses, whipped cream cannons, sushi … even film reels!
In honour of Katy’s penchant for D-cup design, let's take a look at some of pop history's breast and worst boob fashion.