Remember Red Nose Day, that quasi-holiday that used to roll around somewhere in March telling you jokes as a way of prising money out of you?. Well, it still exists in the US, and to celebrate it one of the world's biggest bands, Coldplay, decided to team up with the cast of Game of Thrones to make a spoof musical of the show.In the 12-minute documentary the voice of actor Liam Neeson takes viewers through amusing behind-the-scenes footage."When I first heard of it I was a little sceptical but now I'm completely convinced. It's a horrible idea," said Mark Addy, who plays Robert Baratheon.Emilia Clarke (Daenerys Targaryen) was similarly pessimistic. "One word that springs to mind when I think of it is Titanic," she said.Here's a look at what happens when the cast of TV's most murderous show tries singing.Kit Harrington (Jon Snow) serenaded Rose Leslie (Ygritte) with a rendition of Wild Thing that went: "Wildling, you make my heart sing. You pull your bow string and shoot me."Nikolaj Coster-Waldau (Jaime Lannister) sings about incest: "Are you thinking about Joffrey, such a spirited lad. I was his uncle and also his dad."Peter Dinklage (Tyrion Lannister) warbles smugly about how, unlike most of the cast, he has survived through five seasons.It includes the refrain: "Remember Ned Stark, he was a lot of fun, but he didn't make it past season one. You thought Joffrey had to survive, but he ain't in the credits for season five."The full video can be seen on www.youtube.com..