Steps, Jason Donovan and Sinitta are among the acts who will perform at Pete Waterman's Hit Factory Live.
The event, to celebrate the esteemed music writer's 250 million single sales, will take place at London's Hyde Park on July 11.
Other acts confirmed include Sonia, Bananarama, Dead or Alive - fronted by Pete Burns - and Pepsi & Shirlie, and Pete admits after a quarter of a century of hit writing is it time to have all of his acts perform together on one bill.
He said: ''I've been saying no for years to a Hit Factory concert but now, 25 years on, the timing feels right. It's time to celebrate the hit single and we have a tremendous line-up of our classic artists confirmed to play Hit Factory Live in Hyde Park on July 11. More surprises will be announced over the coming months.''
It is also promised there will be a ''very special duet'' which has been ''23 years in the making'' on the night.
A proportion of the ticket sales will go to Cancer Research UK, and director of partnerships at the charity Jools Tait is delighted to work in conjunction with the event.
He said: ''We're thrilled that this exciting concert will benefit Cancer Research UK. Our work to prevent, diagnose and treat cancer has already saved millions of lives, but there's still more to do. The support of this Live Nation event will help us to raise funds to carry out our groundbreaking work.''