Following participation in several other music festivals, Mascolo was invited to take part in the Swiss Eurovision selection in 1968 with the song "Guardando il sole" ("Looking at the Sun"), which won the competition and went forward to the 13th Eurovision Song Contest, held in London on 6 April. The arrangement for his song was written by Giampiero Reverberi and adapted by Mario Robbiani; on the night, Robbiani also conducted the orchestra. "Guardando il sole" only picked up two points (both from Yugoslavia), to finish in joint 13th place of 17 entries.