5/5 Joan reunites with a choir who performed with her in a tribute song to Nelson Mandela.
4/5 Joan meets the young members of a choir, as they prepare for the Choir of the Year contest
3/5 Joan meets a choir that practices in an embassy and reflects the culture of its homeland.
2/5 Joan meets a choir in Coventry specialising in unaccompanied music from across the globe.
1/5 The singer meets an all-male voice choir devoted to promoting peace and reconciliation.