I Will Always Love You is technically a Dolly Parton song, but good luck telling anyone's mum that.
Fun fact: She was the first artist to chart seven consecutive number-one singles on the Billboard Hot 100.
Drops an album roughly once a decade and people still treat it like a national event.
Fun fact: He ghostwrote songs for Beyoncé, Justin Bieber, and John Legend before releasing his own music.