Nicola Roberts and Kimberly Walsh jetted into sin city this weekend to help Cheryl ring in her 29th birthday.

The Girls Aloud beauties kept fans and followers in the loop with their antics by posting updates and pictures to their Twitter pages.

The pop group bandmates were joined by a number of Cheryl's friends in the Nevada desert city to celebrate her birthday. Manager and friend will.i.am also attended Cheryl's celebrations, after dj-ing at XS nightclub in the city.

The singer has a lot to celebrate as both her album A Million Lights and lead single Call My Name have sat within the Irish Top 5 album and singles charts for two weeks.

(c) Nicola Roberts Twitter

Nicola Roberts posted this picture of Kimberly enjoying a cocktail on their first class flight to Las Vegas. Roberts is currently shooting her fashion design reality show alongside Rihanna and Henry Holland.