LILY ALLEN is to host a secret fancy dress gig later this month, with London Underground as its theme.

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“To give it an extra layer of excitement I’m asking fans to dress as London Tube stations – but they won’t know exactly where I’ll be performing until the day,” said Allen.

As the Smile singer says, the concert is to be held in an as yet undisclosed London venue.

The 11 May gig is Allen’s third leg of her MySpace Secret Show series. The others were held in New York and Tokyo.

“The fans at the Tokyo and New York were totally amazing and I expect nothing less from the home crowd,” Allen added.

Allen returns to London as part of her UK tour in November with shows at the Brixton Academy and for a special performance at Somerset House in July in July.