2Cellos, the young Croatian duo and cover stars of The Strad's January issue, will appear on the hit Fox TV show Glee on 31 January in the US. Luka Sulic and Stjepan Hauser will perform 'Smooth Criminal', the track that made them YouTube sensations, in a special Michael Jackson tribute episode of the high-school musical comedy-drama series. It is the first time that Glee has featured an instrumental group as its guest artist.