Rock legends The Who have unveiled their first song in eight years as they mark their 50th anniversary.
Be Lucky includes lyrical references to Australian rockers AC/DC and French electro band Daft Punk and will be included in a double album featuring the group's greatest hits.
The band will donate royalties from the new track to teenage cancer sufferers.
One of the most influential rock bands of the 20th Century, their hits include My Generation and I Can See for Miles.
Earlier this year, surviving members Roger Daltrey and Pete Townshend announced they would play a tour, which starts in the UK in November, to mark their 50 years in the industry.
Daltrey described the tour as "the beginning of the long goodbye".
The new track Be Lucky features the lyrics "You wanna climb without a safety line/ AC/DC's gonna be fine," and a similar refrain, "You want to climb without a safety line/ Daft Punk will tell you that it's gonna be fine."
Daft Punk's single Get Lucky was one of the biggest hits of 2013.
Recorded at British Grove and Yellow Fish Studios, the Who track features long-time collaborators Zak Starkey on drums and Pino Palladino on bass.
In a statement on their website, The Who said: "In keeping with their ongoing support for Teenage Cancer charities, the band have donated their royalties from the song to Teen Cancer America."
Daltrey was instrumental in founding the Teenage Cancer Trust gigs at the Royal Albert Hall in London in 2000.
In 2011, Teen Cancer America was founded by Daltrey and Townshend in the US.
In April, Daltrey was presented with the outstanding contribution prize at the Music Week awards for his work with the Teenage Cancer Trust.
Singer Paul Weller praised Daltrey's "tireless, fantastic work" for a "very worthwhile charity".
The Who were formed by singer Roger Daltrey, Pete Townshend and John Entwistle in London in 1964 and were joined by drummer Keith Moon before recording their first single.
Moon died of a drug overdose in 1978 and Entwistle died of a drug-induced heart attack in 2002.