Depends on where you are but in the major music markets, they are very popular. In the UK, their last album went to number one, as did all of their previous albums, and was the second fastest selling album of 2013. read more
They performed at the 2012 London Olympics opening ceremony, and they have won a number of mainstream music awards, including the 2014 BRIT awards. In the US, they are slightly less popular, and probably considered a more alternative band although their last album was their highest selling of their career. read more