Luka Sulic and Stjepan Hauser

Luka Sulic and Stjepan Hauser

Dean Bertoncelj/Sony Music/via Bloomberg

Croatian-born cellists Luka Sulic, left, and Stjepan Hauser with their instruments. The duo, who rose to fame after releasing a cover of Michael Jackson's ``Smooth Operator,'' have been touring with Elton John and will appear at New York's Le Poisson Rouge Thursday night.