Cheryl Cole celebrates her 29th birthday in Las Vegas with Nicola Roberts, Kimberley Walsh and Will.i.am

Cheryl Cole is having fun in Sin City

Cheryl Cole enjoyed a special dinner in Las Vegas with pals including Girls Aloud bandmates Kimberley Walsh and Nicola Roberts on Saturday to celebrate her 29th birthday.

It was diffcult to tell who was Cheryl in a picture Tweeted by Nicola as guests all wore Cheryl Cole masks.

But the birthday girl wore a strapless floral play suit for the celebration and her hair in an up-do.

Black Eyed Peas star Will.i.am is also in Sin City and Cheryl partied at XS nightclub where he was a guest DJ.

'Erm... few questions!! Who am I? Where am I?? Why am I?? What am I? @NicolaRoberts @KimberleyJWalsh,' Tweets Chezza, whose ex-husband Ashley, 31, in on holiday in LA.

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Footballer Ashley Cole is 'gutted' about missing a crucial penalty for England in the Euro 2012 quarter-final and has jetted out to LA.