These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Covered Up: Since his version of "You've Got a Friend" is often played on the radio, some casual listeners assume it's his song (he actually was covering a Carole King song). "How Sweet it Is" gets this as well; it was originally performed by Marvin Gaye.
Signature Song: Depending on who you ask, either "Fire and Rain" or "Carolina in My Mind".