First recorded (as “Something Stupid”) by Carson and Gaile (1966).
Hit versions by Frank Sinatra & Nancy Sinatra (US #1/MOR #1/UK #1 1967), Robbie Williams & Nicole Kidman (UK #1 2001).
From the wiki: “‘Somethin’ Stupid’ is a song written by C. Carson Parks and originally recorded in 1966 by Parks and his wife Gaile Foote, as ‘Carson and Gaile’. In the early 1960s, Carson Parks was a folk singer in Los Angeles. He was an occasional member of The Easy Riders (‘Marianne‘. ‘Memories Are Made of This‘) and also performed with The Steeltown Three.
“In 1963 Parks formed the Greenwood County Singers, later known as The Greenwoods, who had two minor hits and included singer Gaile Foote. Before the Greenwoods disbanded, Parks and Foote married and, as ‘Carson and Gaile’, recorded an album for Kapp Records, San Antonio Rose, which included the track ‘Something Stupid’. The recording was then brought to the attention of Frank Sinatra by Carson’s younger brother, then-session pianist Van Dyke Parks, who had also performed with The Steeltown Three.
“Sinatra had played Parks’ recording to his daughter’s producer, Lee Hazlewood, who recalled ‘He asked me, ‘Do you like it?’ and I said, ‘I love it, and if you don’t sing it with Nancy, I will.’ He said, ‘We’re gonna do it, book a studio.” Their rendition was recorded on February 1, 1967. The single spent four weeks at #1 on the US Billboard Hot 100 chart and nine weeks atop the Easy Listening (now Adult Contemporary) chart, becoming Frank’s second gold single as certified by the RIAA and Nancy’s third. The single also reached #1 on the UK Singles Chart. It was the first and only instance of a father-daughter #1-song in America. Nancy Sinatra has said she thinks it’s ‘very sweet’ that some people refer to it as the ‘Incest Song’.
“Several members of the Wrecking Crew were used as session instrumentalists, including Glen Campbell (guitar), Hal Blaine (drums), Victor Feldman (percussion), and Carol Kaye (bass).
“British singer Robbie Williams recorded ‘Somethin’ Stupid’ as a duet in 2001 with actress Nicole Kidman. It topped the UK Singles Chart at the end of the year, becoming Williams’ first Christmas #1 single in the United Kingdom.”
Frank Sinatra & Nancy Sinatra, “Somethin’ Stupid” (1967):
Robbie Williams & Nicole Kidman, TV performance “Somethin’ Stupid” (2001):