2. Beyonce feat. Jay-Z, "Crazy In Love"
Beyonce and Jay Z are currently on their first co-headlining concert series, the On The Run tour. But hip-hop and R&B's royal couple first announced their personal and professional alliance more than a decade ago with a pair of hit collaborations, Hov's "'03 Bonnie & Clyde" and this summer smash that launched B's solo debut, Dangerously In Love.