Roar by Katy Perry. Lyrics: "I got the eye of the tiger, a fighter, dancing through the fire. 'Cause I am a champion and you're gonna hear me roar. Louder, louder than a lion. 'Cause I am a champion and you're gonna hear me roar.
I'm friends with the monster / that's under my bed / get along with the voices inside my head / You're trying to save me / stop holding your breath / and you think i'm crazy / yeah, you think I'm crazy — Eminem ft. Rihanna "The Monster" lyrics