Winehouse is being offered the huge sum for the private show in June.

Daria 'Dasha’ Zhukova – girlfriend of Chelsea Football Club owner, billionaire Roman Abramovich – is heading a project to turn the 1920s building in Moscow into a contemporary art gallery and has lined up Amy for a launch night performance.

The gallery – to be called the Center for Contemporary Culture – is not due to open until September but Daria says they are planning a one-off event in the summer.

She claims they have booked Amy for the night, however Daria will not disclose how much the singer is being paid to appear.

Amy is not the first music star to boost their earnings by playing a private concert.                                             

George Michael received £1.7 million for a 75-minute show at Russian billionaire Vladimir Potanin's New Year’s Eve party in 2006, while the Rolling Stones were paid a total of £4.4 million for playing at the 60th birthday bash of billionaire David Bonderman.// CNN // MySpace