 Chelsea Dagger  is a song by Scottish rock band The Fratellis and their second single. It was released on 28 August 2006.It is taken from their debut album Costello Music, which was released in the United Kingdom on 11 September 2006. It is named after Jon Fratelli 's wife Heather, a burlesque dancer whose stage name – Chelsea Dagger, a play on Britney Spears – he borrowed for the song.helsea Dagger was adopted as the teams' anthem and quickly became a huge part of the Blackhawks brand experience.. The song is used now by the entire Blackhawks system, as the Rockford IceHogs (AHL) and Indianapolis Fuel (ECHL) clubs, all part of the Blackhawks system, use the song after goals.