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BGT special for TV quiz Millionaire
Past Britain's Got Talent stars such as Paul Potts and Stavros Flatley are to take part in a special edition of Who Wants To Be A Millionaire?
The programme will be screened to launch a week of live BGT heats which begin on May 6.
Also taking the hot seat and facing question-master Chris Tarrant will be "streetomedy" duo Twist And Pulse.
Potts, who won the talent show in 2007, will team up with young singer Shaheen Jafargholi, who performed at Michael Jackson's memorial service.
Each of the acts will be competing to raise money for charity.
Demetrios Demetriou, who along with his son Lagi Michalakis makes up Stavros Flatley, said: "I just need to become more decisive as I'm terrible at making decisions. Lagi will no doubt keep me in check."