What Is Love — Haddaway (1993)

"What Is Love" reached the top five in 13 countries simultaneously in 1993, selling 2 million units in Europe alone. Its iconic head-bobbing meme from Jim Carrey in A Night at the Roxbury made it one of the first viral music moments of the internet age, generating over 100 million YouTube views. The song's Eurodance beat is 30% heavier than the typical pop production of #1 "Macarena," cementing its club anthem status.