Ozzy's group Black Sabbath recorded this in 1972 for their album Vol. 4. Kelly is Ozzy's daughter, and when they recorded it as a duet, they changed some of the lyrics to make it about a father and daughter drifting apart.
This came out around the time Ozzy crashed his ATV. He was badly hurt, but the publicity from the accident helped this song do very well in the UK.
This was not the first father/daughter collaboration to top the UK charts. Frank and Nancy Sinatra reached #1 with "Somethin' Stupid" in 1967.
For the original 1972 version, Black Sabbath guitarist Tony Iommi stayed up all night snorting cocaine and learning piano while the band was in LA recording Vol. 4. Ozzy came in and heard the piano part that Iommi had written, and liked it. Ozzy started singing and, on the final recorded version, Geezer played the mellotron.
The song was covered by American soul singer Charles Bradley in 2013 as a Record Store Day single and later became the title track and cornerstone of his third album.
Bradley told Noisey why he likes the track so much. "That song is very emotional to me. I didn't want to learn that song, I used to sing it lyric by lyric. But when I listened to the whole song, the story of the song it made me think about talking with my mother, bonding. I'd come home from tour… and I'm the only one out of her boys that she'd let come in and jump in the bed with her, and we'd sit there and talk. She'd tell me a lot of things about her.
The last 12 years of her life, she actually told me things that got me stronger. She told me 'I was trying to tell it to all y'all kids, but y'all didn't listen to me.' I'm glad I took the open heart and said let bygones be bygones and let's get to know each other."