Amy Winehouse in hospital

Amy Winehouse is back in hospital.

The singer has checked into a private medical facility on London's Harley Street after picking up a bug following her recent gigs in Brazil.

Her spokesman says, "It's nothing serious - she's just got a virus.

Amy recently announced plans for her first European gig of 2011 - she will play Bilbao BBK Live in July.

Coldplay will be on the headline acts.