Katie Perry ft. Juicy J – “Dark Horse” – 1.243 billion views

A kooky and visually stunning video, “Dark Horse” was a genre crossing hit that received heavy radio play and quickly racked up the YouTube views. As catch as the song is, it also boasts one of the stranger lyrics you’ll hear in any song, with Juicy J rapping: “She’s a beast, I call her Karma, she eat your heart out like Jeffrey Dahmer.”