Gary Barlow is to team up with the Military Wives and Andrew Lloyd Webber at the Classic Brit Awards next month.
Gary and Lord Lloyd Webber are to appear on stage playing grand pianos as they perform the chart-topping single they composed for the Queen's Diamond Jubilee celebrations, Sing.
The track was recorded with artists from around the world in many locations and featured the Military Wives choir. Gareth Malone will conduct the performance at the Royal Albert Hall on October 2.
Gary said: "The Classic Brits is something I've never done before, so I'm very excited to be a part of it.
"It'll be nice to get everyone back together for a performance of Sing as we've only ever performed it once together live."
The song is up for single of the year at the awards event.
Also announced to join the line-up of performers at the event, officially called the Classic Brit Awards 2012 with MasterCard is Russell Watson.
He had to cancel an appearance the night before last year's show due to ill health.