"Radio" is a song by British pop singer Robbie Williams, co-written by Williams and Stephen Duffy. It was the first single from Williams' compilation album Greatest Hits, released in 2004. Williams wrote the song's distinctive synth-pop melody by attempting to play Harold Faltermeyer's "Axel F" on an electronic keyboard from memory. "Radio" is Williams's first solo outing without the involvement of long-time producer and co-writer Guy Chambers, and is particularly notable as Williams's last UK number-one for eight years, until 2012's "Candy".

Robert Peter Williams is an English singer and songwriter. He found fame as a member of the pop group Take That from 1990 to 1995, launching a solo career in 1996. His debut studio album, Life thru a Lens, was released in 1997, and included his best-selling single "Angels". His second album, I've Been Expecting You, featured the songs "Millennium" and "She's the One", his first number one singles. His discography includes seven UK No. 1 singles, and all but one of his 14 studio albums have reached No. 1 in the UK. Six of his albums are among the top 100 biggest-selling albums in the UK, with two of them in the top 60, and he gained a Guinness World Record in 2006 for selling 1.6 million tickets in a single day during his Close Encounters Tour.