A woman sings a duet with Dusty Springfield, and a golf fan meets Colin Montgomerie.

John Barrowman chooses some of his most memorable moments from the series.

Legendary soprano Dame Kiri Te Kanawa duets with an aspiring opera singer.

Mel C takes to the stage with one of the Spice Girls' biggest fans.

Pop sensation Sophie Ellis-Bextor duets with a brave young woman.

Beverley Knight duets with one of her biggest fans.

Nicola Roberts duets with a fan, and Chris Boardman races a cycling-mad fundraiser.

A fan of Dolly Parton gets a masterclass from the queen of country.