4. "The Bridge Is Over," Boogie Down Productions
One of the earliest rap beefs was the Bridge Wars between Bronx and Queens rappers over where the birthplace of rap really was. It started with Marley Marl and MC Shan's "The Bridge," which claimed that Queensbridge is where rap was officially born, but KRS-One and Boogie Down Productions fought back with the track "South Bronx" and then the "The Bridge Is Over," which essentially ended the feud and contributed to the end of MC Shan's career. Blending rap with reggae, "The Bridge Is Over" became an influential song in hip-hop and even included a humorous toss to Billy Joel when he raps in the style of the melody for Joel's "It's Still Rock and Roll to Me."