Just four months after ”retiring”, Lily Allen has announced a festival appearance.

The 24-year-old, who had previously said that a show with Dizzee Rascal at the O2 Arena would be her last, has signed up to join Jay-Z at London’’s Wireless festival on July 4.

The Smile star, who wowed Jay-Z at the Brits, will join the rapper in the show in Hyde Park in a line-up, which also includes Mr Hudson.

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

””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,”” the Telegraph quoted her as saying.