"Who Do You Love?" is a Bo Diddley hit from 1956, classic rock and roll. The beat of the song is sometimes called the Bo Diddley beat and its a perennial rock and roll favorite. Springsteen borrowed the beat for "She's the One", so the segue between the two songs is natural. "She's the One" is from Springsteen's Born to Run album. It was released at the B-side to "Tenth Avenue Freeze Out", which sorta makes it the third single from that most excellent record. "She's the One" is a fun song to play on guitar when you're starting out.