Hay began to let his hair grow more than 50 years ago because he often got sick after a haircut, the Vietnam News quoted his wife, Nguyen Thi Hoa, as saying. Media reports said he lived a simple life as a herbalist, but his hair could complicate things.
This song was written by the Motown songwriter Leon Ware and his songwriting partner T-Boy Ross (Diana Ross' brother). Ware originally intended to record it himself, but after Motown CEO Berry Gordy heard a rough version of it, he convinced Ware to give the song to Marvin Gaye. When Gaye recorded the song in 1975, the singer was inspired by his relationship with his nineteen-year-old girlfriend Janis Hunter.
In early 2015, he released his debut single Marvin Gaye -- a duet with Meghan Trainor. Shortly thereafter, he gained much greater exposure as the co-songwriter, pianist, and featured vocalist on Wiz Khalifa 's See You Again, recorded as a tribute to actor Paul Walker for the soundtrack to Furious 7.