Lily Allen to play Wireless festival with Jay-Z

Lily Allen looks set to enjoy one of the shortest retirements in pop after announcing a festival appearance - just four months after her "final" gig. (AFP PHOTO/SCANPIX/Kyrre Lien)

Lily Allen looks set to enjoy one of the shortest retirements in pop after announcing a festival appearance - just four months after her "final" gig.

The star was insisting for months that a show with Dizzee Rascal at the O2 Arena would be her last before she concentrates on fashion.

But the Smile star has now signed up to play on the same bill as Jay-Z at London's Wireless festival on July 4.

Allen, who wowed the rapper at the Brits, will join him in the show in Hyde Park in a line-up which also includes Mr Hudson.

"I was very flattered to hear that Jay-Z wanted me to support him at Wireless and, combined with my dates in March with Dizzee Rascal, I am excited to end my current string of live shows in such prestigious company," she said.

Allen, 24, is set to launch her vintage clothing line, Lucy In Disguise which she set up with elder sister Sarah Owen, at the Vintage At Goodwood festival in August.

"I'm having a career change for a while. I'm concentrating on something else. I'd like to get my brand and my shop going, and then if it does well, we'll definitely think about branching out on our own label," she told the Press Association.

Allen said she wanted to stop touring and making music because it's a "really big commitment".

P!nk will headline the festival on Friday, July 2, supported by Ting Tings, Gossip and The Temper Trap, but the Saturday night bill-topper is still to be announced.