hat saint barth couple

Fergie and hubby Josh Duhamel arrived in St. Barth this morning, just ahead of the Black Eyed Peas' big New Year's Eve gig for Russian billionaire Roman Abromovich.

The Peas are set to perform at Abromovich's massive Gouverneur Beach estate for the rich guy's annual NYE party. Ashton Kutcher and Demi Moore, P Diddy, Ellen DeGeneres and Portia De Rossi, Victoria Silvstedt, and a whole mess of other stars are expected.

Reports claim Fergie and friends are getting a cool million for the performance. Last year Gwen Stefani performed.

The couple are staying in one of the most exclusive and expensive residences on the island ... no doubt paid for by Abromovich!