Folk group Mumford & Sons had no idea they would be performing with music icon Bob Dylan at the Grammy Awards until the very last moment.
The group's keyboard player Ben Lovett admits there was no time for him and his bandmates to get nervous about playing with Dylan - because they weren't told who their "special guest" would be until they hit Los Angeles for rehearsals.
The Brit says, "They were like, 'We haven't confirmed who it is that you're going to be collaborating with', but they said, 'Trust us, you won't be disappointed'. They were right."
Dylan and Mumford & Sons performed as part of a tribute to folk music at the Grammys on 13 February (11).