British sisters Nicola and Rosie Dempsey trained separately in sketch and improv with the iO, Second City and Bad Dog Comedy Theatres in Chicago and Toronto before establishing their piano/percussion double act. They had a viral hit with their 2016 Song, about all the bad events of the year. In late 2017, their songs formed the basis of a TV advertising campaign for the Nationwide building society. And in 2018 they were named best music or variety act in the Chortle Awards.