In Beastie Boys' "Paul Revere," the title refers to the name of a horse. They took it from a song in the musical Guys And Dolls where a character sings, "I got the horse right here, the name is Paul Revere."
Will.I.am, literally dreamt up "I Gotta Feelin'." Said the Black Eyed Pea: "Have you ever had a dream where there's a melody in your dream? I'll wake up out of my sleep and record that! 'I Gotta Feelin' was one of those songs."