Post a song that was popularized by another group but was actually written and performed by someone else. No Carole King songs please because she only performed after the fact.
I'll start. Richard Berry's version of "Louie Louie"
https://www.youtube.com/watch?v=z-2CKsaq5r8
Leonard Cohen - Hallelujah
https://www.youtube.com/watch?v=qL8w_53URlA
https://www.youtube.com/watch?v=ORfoK5Ap0FA
Bobbie Gentry Fancy
the nerves - hangin' on the telephone, that blondie turned into a hit.
https://www.youtube.com/watch?v=emy5mA8Ixtc
rodney crowell wrote & performed shame on the moon before bob seger had a hit with it.
https://www.youtube.com/watch?v=LeVboqujISI
crowell had several songs that were popularized by others.
leaving louisiana in the broad daylight:
https://www.youtube.com/watch?v=qFSHnZGA0cA
til i gain control again
https://www.youtube.com/watch?v=Z9UhOwfUAMA
The Byrds - You Ain't Goin' Nowhere - a Bob Dylan original
https://www.youtube.com/watch?v=s2JnDKvuNzw
A boy named sue- Shel Silverstein
https://m.youtube.com/watch?v=KZNZt5qVgvM
Big Mama Thornton - Hound Dog
https://www.youtube.com/watch?v=frsBq9MCNVg