France's entry in 2009, Et s'il fallait le faire by Patricia Kaas. Only one person on stage, hardly any light or stage show, just 2 minutes and 45 seconds of singing followed by a tiny bit of dancing. Listen to the audience reactions.
For context, Finland doesn't exactly have the best track record when it comes to Eurovision and the popular opinion among Finns was that "Hell will freeze over before Finland wins ESC." Cue the Flying Pigs when Lordi's votes got counted.
The butterflies used to show each country's flag 2013 were beautifully made and just plain epic; they would fly in, land were the country's flag should be right before the country performed their song, and fly away off-screen.
The butterflies were also used to present which countries that qualified for the final. There would be a shadow resembling a butterfly, and when a country was revealed, the country's butterfly would appear on that spot. Just see itfor yourself.
2014's winner, Gender Bender and The CutieConchita Wurst, using her victory moment to deliver a short but powerful speech — “This night is dedicated to everyone who believes in a future of peace and freedom. You know who you are — we are unity and we are unstoppable.”
Even before Conchita Wurst, 1998 winner Dana International. At the time of her entry of the contest, there had been no (out) LGBT representatives to the contest before, making her, a transgender woman, a landmark. When she won on the final vote, it suddenly became all the more evident that the LGBT community and Eurovision went hand in hand, and her victory allowed for more LGBT contestants to enter in the years to come.
Actually, there had been LGBT artists representing in Eurovision for years and years before Dana came around, but they all performed without any hints of their sexuality. The first time a sexual minority was visible onstage was Norway's 1986 entry "Romeo" by Ketil Stokkan, where a drag queen from a local troupe performed backup dancing.
Additionally, to further reach out to the LGBT community, the 2016 finals became the first time the contest was ever broadcast in America, in partnership with the LGBT television channel Logo (and represented by its own gay commentators as well).
The 2016 contest is very unique in that many countries that are usually defeated in the semi-final qualified to the final (Croatia, Bulgaria and Czech Republic). Special mention goes to Czech Republic, which qualified for the first time ever.
It's also particularly of note that none of the countries ever got 0 points in either the semi-finals or finals. The quality of songs overall was the best it has been in a long while.
Bulgaria also got its best result ever in the final, with a fourth place. Given that the same artist competed in 2011 without qualifying for the final, this could count as sweet revenge for her.
After the jury voting, Polish performer Michał Szpak was 25th out of 26 with only 7 points. 2 minutes later, Poland jumped to 8th place as "Color of Your Life" was third in the televoting, with 229 points.
Ukraine beating Russia for the win in 2016, especially considering how their song ("1944") is indirectly about the conflict over Crimea, which partially motivated Ukraine to skip Eurovision 2015 in the first place.