Can You Help? Can't Remember A Songs Name. I Just Remember The Video Clip.

Ok, here is what I can remember about the music video : A boy enters a pub and starts dancing and people start to look at him and then three girls join him and after more people start joining him. I remember it saying that the video was is wales, and during the video people who joined the dance explain to a Tv reporter that they didn't know what had happened to them they just stood up and joined that contagious dancing boy. And the end of the video the boy who entered the pub and started dancing goes to the toilet and somebody push him and he falls on the floor and the guy who pushed him give him a paper that says its a contract and another guy enter the toilet and take the paper after the boy signs it. Ok that's basically what i remember. If anyone know the name of the song or the band please let me know!
Thank you very much.

Room 5-make love I think..lynx advert