Country music legend Willie Nelson is to become a doctor - of music.

The marijuana-loving singer/songwriter will be handed an honorary doctor of music degree by Berklee College of Music, alongside Carole King and Annie Lennox.

The presentation will be made during Berklee College's commencement ceremony in Boston, Massachusetts on 11 May (13). Lennox will deliver the commencement address.

Previous honourees include Duke Ellington, Aretha Franklin, Loretta Lynn, Bonnie Raitt and David Bowie.