Perry performed the halftime show at Super Bowl XLIX. It was the highest-rated Super Bowl halftime show in history.
Perry's high-profile marriage to comedian and activist Russell Brand ignited a steady stream of headlines before ending in divorce a year later.
Perry's"Teenage Dream" would wind up as the only album recorded by a woman to spawn five number-one hits — including "Last Friday Night," "Firework," and the title track.
"I Kissed A Girl," Perry's provocative debut pop single, was released. The first station to pick it up was 107.5 The River in Nashville. The station received constant requests for the song in the following three days. It later spent seven weeks at number one.
Perry's first record, "Katy Hudson," featured music in a contemporary Christian style. While well-reviewed in Christian magazines, it didn't sell many copies, and remains a collector's item.