Good Songs on Instagram: "15 years ago, Katy Perry kicked off one of the biggest pop eras ever with her album Teenage Dream. Filled with hits like “Firework,” “California Gurls,” and “Last Friday Night,” it defined early 2010s pop. The album was fun, bold, and full of color — showing Katy’s unique mix of confidence and creativity. Many still see it as one of the best pop albums of its time. 🎆 . . . #katyperry #teenagedream #popmusic #2010s #firework"