Susan Boyle may be dropping out of 'Britain's Got Talent: The Champions'.

Susan Boyle

Susan Boyle

The 'I Dreamed A Dream' singer - who was runner-up on Simon Cowell's show in 2009 and has become a huge star - could be forced to miss the special series because of scheduling conflicts.

A spokesperson told The Sun newspaper's Bizarre TV column: "Susan has a busy year ahead with lots of performances coming up, trips to the US, headlining BBC Proms in September, as well as preparing for her upcoming tour.

"She is enjoying celebrating the decade since she first appeared on 'BGT' and her life changing for the better.

"She loved being part of 'AGT Champions' and, whether she is able to make it or not, wishes the contestants taking part on 'BGT Champions' the best of luck."

Susan appeared on 'America's Got Talent: The Champions' last year and also released her eighth studio album 'Ten' - celebrating a decade in the spotlight - meaning her schedule might be too packed to juggle the show as well.

Meanwhile, dance troup Diversity - who beat Susan to be crowned winners 10 years ago - have also confirmed they won't be available for a triumphant return.

Ashley Banjo said: "Who would have thought ten years ago when we won BGT we would be preparing for our biggest tour yet, Born Ready? While we are unable to take part, we wish all the acts the best of luck."

Filming for the upcoming series is set to start this week, with the likes of crooner Paul Potts, dance duo Stavros Flatley and knife swallower Alex Magala taking part.