Pop music has provided a soundtrack for the lives of billions of fans throughout recent history, giving every generation a set of songs to sing along to for decades to come. Today, your favorite artists like The Weeknd, Halsey, Finneas, and Khalid are the voices of pop, but past eras were defined by the tunes and lyricism of Mariah Carey, Elton John, Prince, Frank Sinatra, and other legends.