"Your Heart on Your Sleeve" contains a sample from the song "Here She Comes Now", by The Velvet Underground.
Originally intended for Nico to sing (who did indeed sing it on a few occasions during the Exploding Plastic Inevitable shows), the song was demoed in 1967 by Lou Reed, Sterling Morrison and John Cale.
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French artist Colleen works a sample of the song's opening notes into the full track, "Your Heart on Your Sleeve," from her 2003 debut album, Everyone Alive Wants Answers.