"Single" is a pop song written by British singer Natasha Bedingfield, Steve Kipner, Andrew Frampton and Wayne Wilkins for Bedingfield's debut album Unwritten (2004). The song was produced by Kipner, Frampton and Wayne Wilkins and received a positive reception from music critics. It was released as the first single in Europe in the second quarter of 2004 and reached the top five in the United Kingdom. In North and Latin America, "Single" was released as Bedingfield's third single in the second quarter of 2006. On the U.S. Billboard Hot 100 chart, the song reached number fifty-seven.

The music video for "Single" was directed by Jake Nava and premiered on March 26, 2004 in the United Kingdom. The video features four sequences. It begins with Bedingfield waking up and getting ready to go out. She is then shown walking down the street past various shops, stopping at a photo booth to take photographs with a guy she had met on the street. Dressed in jeans and a silver jacket, she is next shown performing a choreographed dance with three female dancers in an underground tunnel. The final sequence of the video features Bedingfield at a party sitting outside on a patio, singing to herself. As the video concludes, she is shown staring at the camera as her image gradually fades.

In North America, a slightly different music video was released. The North American version featured extended photo booth and party scenes. The guy who Bedingfield meets at the photo booth is featured more predominantly in the video, with Bedingfield singing the song to him. The music video, as well as behind-the-scenes footage, was released commercially on the song's CD single.