Warnerbring participated eleven times in Melodifestivalen, the Swedish qualifying competition of the Eurovision Song Contest. His first appearance was in the 1959 contest with the song "Kungsgatans blues" which finished in fourth place. In 1960 he sang "Alla andra får varann"; the song won, and was performed by Siw Malmkvist at the Eurovision finals in London. Warnerbring sang two songs in the 1962 contest. "Lolo Lolita" placed fourth and "Trollen ska trivas" sixth. In 1967, Warnebring won Melodifestivalen with "Som en dröm", and performed the song at that year's finals in Vienna. His final appearance in Melodifestivalen was in 1974, when "En mysig vals", written by himself, was placed tenth and last.