"Somethin' Stupid" is a song written by C. Carson Parks in 1966 and sung by British singer Robbie Williams with Academy Award-winning actress Nicole Kidman. The song appeared on Williams' 2001 album, Swing When You're Winning, and it topped the UK Singles Chart at the end of the year. The song became Williams' first Christmas number-one single in the United Kingdom, and fifth as a featured artist. The single sold 98,506 copies in its first week and 366,000 copies over all earning a Silver Certification by the BPI.
The song was the 30th best selling single of 2001 in the UK. The song also became another number-one single for Williams in New Zealand, being certified Gold, and became, at the time, his best selling single in Europe charting inside the top ten in most countries. In Australia, it became Williams' fourth top ten single, earning a Gold certification for over 35,000 copies sold.