One Direction: Tribute song to group's mothers goes viral - listen
From Dave Cribbs and Luke Frank, the tribute to Tricia, Maura, Karen, Jay and Anne is now available on iTunes, with proceeds going to charity Believe in Magic.
> One Direction 'mocked by Blink-182 12 years ago'
> One Direction fans mob wrong person in New Zealand
Watch 'Mum Direction' below: