Gare du Nord is a Dutch-Belgian jazz band, originally consisting of Doc (Ferdi Lancee) and Inca (Barend Fransen). Doc played guitar and Inca played saxophone, while both performed vocal duties. After the pair split up in 2013, the band continued to work and tour with a different line-up.

Source: Wikipedia (https://en.wikipedia.org/wiki/Gare_du_Nord_(band))