Question:  "Bye Bye I Love You" was the Luxembourgish entry in the Eurovision Song Contest, in which year, the song is notable in the history of the Contest; it was the very first entry composed by Eurovision veteran Ralph Siegel, who would go on write 19 ESC entries throughout the 1970s, 1980s, 1990s and 2000s, 1 for Switzerland, that participated in the Eurovision Song Contest 58 times?
Sentence (from "Ein bißchen Frieden"): It was performed by 17-year-old German high-school student Nicole, resulting in Germany's first win at the Eurovision Song Contest by a record margin of 161 points, setting a new record for the largest winning margin that lasted until the Eurovision Song Contest 1997.
Relevant evidence: No