This bluesy track is a cover of an unreleased song by J.J. Cale, who passed away in 2013 at age 74. The recording originated when Clapton was working on his 2014 The Breeze record. "When I did this J.J. album called The Breeze, which was a tribute to J.J. Cale, when I met up with his wife, Christine, I said, 'Is there anything lying about that I could maybe finish or work with?' She gave me two CDs of unreleased material which is all fantastic," Clapton explained to Billboard magazine. "We covered 'Somebody's Knockin'."
Clapton held Cale in very high regard and recorded a number of the Oklahoma songwriter and guitarist's songs including "After Midnight," "Cocaine" and "I'll Make Love To You Anytime." Clapton also did a joint album with Cale in 2006 titled The Road To Escondido.
It has long been speculated that the Soundgarden song "Black Hole Sun" came from the name of a sculpture in Seattle, but according to their frontman Chris Cornell the title came from a phrase he misheard on the news. The band's name did come from a sculpture.
Carla Thomas became the first woman to achieve a Top 10 hit on the Hot 100 with a song she wrote herself when "Gee Whiz (Look At His Eyes)" reached the chart's top tier in 1961. Thomas was just 16-years-old when she penned it.