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 "Bye Bye I Love You"): "Bye Bye I Love You" was the Luxembourgish entry in the Eurovision Song Contest 1974, performed (despite the English of the title, although the title phrase is in that language) in French by German-British singer Ireen Sheer.
Relevant evidence: Yes