"1 Thing" is an R&B/funk/go-go song written by American singer-songwriter Amerie and Rich Harrison, and recorded by Amerie. The first single from Amerie's second studio album, Touch (2005), and the only single from the soundtrack to the 2005 romantic comedy film Hitch, "1 Thing" peaked at number eight in the United States and number four in the United Kingdom, becoming Amerie's first top ten single and her biggest hit to date, also peaking at number one on the U.S. R&B singles chart. The single was certified platinum (200,000+ copies) by the RIAA and earned Amerie a Grammy Award nomination for "Best Female R&B Vocal Performance" at the 2006 Grammy Awards. "1 Thing" was certified gold by the RIAA for selling 500,000 in ringtones. A remix of the song features rapper Eve.