Since 1972 has participated with 24 songs in the Eurovision Song Contest, the latest being the 2017 Sammarinese entry "Spirit of the Night" by Valentina Monetta and Jimmie Wilson. In 1982, Siegel's and Bernd Meinunger's song Ein bißchen Frieden (A Little Peace), performed by Nicole won the Contest and became a hit in Europe. In 2003, both writers had success with Let's Get Happy, performed by Lou which came in 11th. In February 2010, it was announced by RTÉ that he would have an entry in the Irish National Final-Eurosong 2010. The song titled "River of Silence" was performed by Lee Bradshaw. It finished in last place. He also composed 'C'était ma vie', performed by Lys Assia for representing Switzerland in the Eurovision Song Contest. She reached an 8th position in Swiss National Final.