Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge (R), Camilla, Duchess of Cornwall (L) and Prince Charles, Prince of Wales (2nd,R)

Prince Charles, Prince of Wales, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge

Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Gary Barlow (R)

Gary Barlow performs onstage

Marcus Collins

Camilla, Duchess of Cornwall, Prince Charles, Prince of Wales, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge

Lulu performs onstage in aid of the Prince's Trust at The Royal Albert Hall

L-R Gary Barlow and Olly Murs perform onstage

L-R Prince Charles, Prince of Wales and Catherine, Duchess of Cambridge watch Gary Barlow perform onstage

Jason Donovan performs onstage

L-R Camilla, Duchess of Cornwall, Prince Charles, Prince of Wales, Catherine, Duchess of Cambridge and Prince William watch Gary Barlow perform onstage

L-R Gary Barlow and Jason Donovan perform onstage

Gary Barlow performs onstage