Watch Neil Young's birthday tribute to Willie Nelson
Neil Young, Chrissie Hynde and U2 are among the artists who have celebrated Willie Nelson's 80th birthday, which took place yesterday (April 30).
Tributes paid by scores of musicians and friends - including Young, Hynde, Bonnie Raitt, John Mellencamp, Norah Jones and Band Of Horses - have been posted on Nelson's website.
Neil Young sings "Happy birthday" to Nelson from the balcony of a roadside motel, adding: "80 years, unbelievable. Keep on rocking, man."
Hynde has written a piece, in which she says, “Oh Willie - where would we be without you? Always and inspiration...”
U2, meanwhile, released a video of them duetting with Nelson. The song, "Slow Dancing", was released on 2003's The Essential Willie Nelson album but the video - directed by Lian Lunsen - has not previously been released.
The rest of the tributes to Nelson can be found here.