"I Can't Let Go" is The Hollies' first 1966 single, and their last with original bassist Eric Haydock. It peaked at number two in the UK and number 42 on the Billboard Hot 100 in the US. The song was co-written by Chip Taylor, who also wrote "Wild Thing". "I Can't Let Go" was a cover of blue-eyed soul singer Evie Sands' version on George Goldner's Blue Cat label, which was popular in New York City in 1965. The Hollies' version was praised by Paul McCartney, who thought Graham Nash's soaring tenor in the chorus was a trumpet. After "I Can't Let Go" was recorded Haydock was replaced by Bernie Calvert, who played on the band's next single ("Bus Stop").Linda Ronstadt released a successful version in 1980 from her platinum-certified album, Mad Love. The disc's third single, it reached number 31 on the Billboard Hot 100. Les Fradkin covered the song on his 2006 album, Goin' Back.