Happy 71st Birthday to Mr. Stevie Wonder born May 13th, 1950!

For the last year or so my favorite song by Stevie has been Don't Wonder Why from his 1970 Signed, Sealed, Delivered album. I had listened to the song a few times before and it never registered and suddenly one day I listened to it with new ear buds and the background vocals were louder and clearer and it changed everything. I've said several times that my favorite period of Stevie is between 1967-1971. So what's your favorite Stevie song?