The Saturdays - Sick The Saturdays Star Misses Gig

The Up hitmakers took to the stage at the British capital's O2 Shepherd's Bush Empire on Thursday night (12Jan12) to sing at the Tickled Pink charity concert alongside stars including Alexandra Burke and Chipmunk.

However, they were forced to perform without White, who is said to have been struck down with food poisoning after a recent trip to Thailand.

A source tells the Daily Mirror, "Vanessa fell violently ill after doing the interviews and she was just too sick to go on stage. Management have sent doctors around to her, she's on the mend."