"One Song" is a song by Prince

Prince (musician)

Prince Rogers Nelson , often known simply as Prince, is an American singer, songwriter, musician, and actor. Prince has produced ten platinum albums and thirty Top 40 singles during his career. Prince founded his own recording studio and label; writing, self-producing and playing most, or all, of...

 (his stage name at that time being an unpronounceable symbol). It was released December 31, 1999 on his website

Website

A website, also written as Web site, web site, or simply site, is a collection of related web pages containing images, videos or other digital assets. A website is hosted on at least one web server, accessible via a network such as the Internet or a private local area network through an Internet...

, love4oneanother.com. The page included downloads and full lyrics.

The track is an upbeat ballad with a positive message with a sound similar to Prince's late 1990s material.