Cheryl Cole celebrated her 28th birthday at London’s Sanderson Hotel last night.

The former ‘X Factor’ star partied with friends including Nicola Roberts, Kimberley Walsh and Black Eyed Peas singer will.i.am, Cheryl is trying to get over her shock sacking from the US version of the show.

A friend told The Sun newspaper: ‘Her moping about ‘The X Factor’ is over. She’s determined to jumpstart her career. She still has America in her sights.’

Cheryl wore Stella McCartney white dress for the occasion.

Ex-husband Ashley did not make an appearance despite rumour’s the couple are back together.

Cheryl has only been seen in public twice since she was replaced by Nicole Scherzinger on ‘The X Factor’, the other time at the US embassy in London earlier this week – she wanted to let her fans know she was doing fine.

She wrote on her website: ‘I have had the time that I have not had in so long to just chill with my loved ones and do the normal things that I like to do. See my friends and family and be with my doggys. It feels long overdue and sooooo good, even my feet are happy to not have to wear a pair of high heels hehe.

‘It also breaks my heart a little when i hear that some of you worry about me and need to know that I am ok, so I want to PROMISE you that I am absolutely fine and more than OK! (sic)’