Billboard #1 Hits of the 1980s (Part 3: The 80s are Weird Edition) by CourtneyKhaaaaaan

Question 1

This last 80s quiz of my series is a hodge podge of random genres but let's start with one of my favorite artists of all time: Falco. This guy was so f'n cool that, in 1986, he scored the only #1 song that is primarily sung in German. NAME THIS SONG which name-checks a famous composer and whose video featured Falco in full 18th century garb.

Rock Me Amadeus