This was written and originally recorded by The Isley Brothers and included on their 1976 Harvest For The World album. The Isleys' version was dedicated to their mother.
The song was revived and turned into a slow jam by American singer Aaliyah for her debut studio album Age Ain't Nothing but a Number. Released as the record's second single, it peaked at #6 on the Billboard Hot 100.
The track was produced by R. Kelly (Aaliyah was R Kelly manager's niece). With the release of Age Ain't Nothing but a Number, rumors started circulating of a relationship between Aaliyah, who was 15 at the time and Kelly. It was later revealed the pair married on August 31, 1994, and Aaliyah had lied about her age on the marriage certificate. The marriage was annulled the following February when Aaliyah's parents found out.
Drake is a huge fan of Aaliyah and in 2010 he sampled part of her refrain from this for his Thank Me Later track "Unforgettable." Four years later singer Tamar Braxton sampled this song on her Calling All Lovers cut "Let Me Know."
In 2015 Frank Ocean recorded a cover, dropping the rendition on his Tumblr page to mark what would have been Aaliyah's 36th birthday. A slightly different version was also included on his visual album Endless the following year, which featured string arrangements by Radiohead guitarist Johnny Greenwood, played by the London Contemporary Orchestra. The credits for Endless reveal that the song was recorded at London's Abbey Road studio made famous by The Beatles.
Kid Rock's "All Summer Long" is a mashup of "Werewolves Of London" and "Sweet Home Alabama." The album it came from was released in October, 2007, but they held off until summer, 2008 for a more seasonable release.