Stars duet for Bennett birthday

Tony Bennett won a Grammy for The Art of Romance

Sir Paul McCartney is one of several stars who will duet with Tony Bennett to mark the singer's 80th birthday.

Sir Elton John, Bono, George Michael, Sting, Mary J Blige, Barbra Streisand and John Legend will also appear on an album celebrating the star's big day.

The crooner, whose hits include I Left My Heart in San Francisco, first hit the charts in the 50s and won a Grammy last month for his latest album.

Bennett turns 80 in August and the album will be released in September.

The singer recently signed a deal with record company Sony BMG, which described him as "one of the most legendary performers of all time".

Bennett is currently on a tour of the US, which takes in Florida, California, New Jersey and Texas.