Lily Allen was forced to pull out of her performance at a Spanish music festival over the weekendafter she fell too ill to fly to the event.

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The “Smile” singer was scheduled to appear at Benicassim Festival on July 17, but was forced to cancel after coming down with a bout of gastroenteritis.

“She is very sorry to let fans down and hopes to be back to full strength as soon as possible,” a rep for the singer wrote on her MySpace.com Blog.

Lily later took to her Twitter.com page to later express her regret at having to miss the festival, writing, “Wish I was at Benicassim, got a bug and been vomiting all day. Thank you to the lady who gave me a bag to vomit in at Gatwick (airport) this morning.”