Happy birthday, Katy Perry! The pop superstar best known for her catchy songs and flashy outfits turns 28 today. Katy started singing gospel music, and she's had her share of moments in the spotlight, first skyrocketing to superstardom with her hit "I Kissed a Girl." And not much has changed — she's still one to speak, and sing, her mind. Katy's covered lyrics from believing in yourself in "Firework" to surviving heartbreak in "Wide Awake," which she said is about her relationship with ex-husband Russell Brand. Have a look at some of her most memorable lines and join us as we wish her a happy day!