Luxembourgian broadcaster RTL almost invariably chose their Eurovision entry by internal selection. Unusually in 1976, however, they organised a five-song final in which Marcus participated with "Chansons pour ceux qui s'aiment" ("Songs For Those Who Love Each Other"). He won the selection, so went forward to the 21st Eurovision Song Contest which was held on 3 April in The Hague, where "Chansons pour ceux qui s'aiment" fared less well than expected, placing 14th of the 18 entries.