Espionage is a New York-based Norwegian songwriting and music production team consisting of Espen Lind and Amund Bjørklund. Their breakthrough came in 2006 as co-writers of Beyoncé's worldwide smash "Irreplaceable", which was number 1 on the Billboard Hot 100 for 10 consecutive weeks and the best selling single in the US in 2007. They are probably best known as the producers and cowriters behind several of Train's major hits after 2009, including "Drive By" and their comeback single "Hey, Soul Sister", which is among the 20 highest selling singles of all time in the US. Espionage has received numerous BMI Awards.