In November 2013 , he was featured in the rapper Sido 's hit " Einer dieser Steine " , singing in the refrain . An even bigger hit for Forster was " Au revoir " , this time with roles reversed — Forster listed as primary artist and featuring Sido — with this single being a prelude to the very successful album '' Bauch und Kopf '' in 2013 . The album was certified gold and included the now-smash-hit " Au revoir " and two other follow-up hit singles , " Flash mich " and the title track " Bauch und Kopf " , the latter of which won Bundesvision Song Contest 2015
Bundesvision Song Contest 2015
Bundesvision Song Contest 2015
Mark Forster (singer)