1. Ariana Grande channels the '60s onstage.
2. Charli XCX and Iggy Azalea put some fancy pep in their step.
3. Shakira nearly has a self-inflicted Janet Jackson moment.
4. Justin Timberlakeaccepts his "Top 200 Artist" award in style.
5. Katy Perry points attention to her assests during her performance.
6. Miley (and her tongue) introduce her performance.
8. A Michael Jackson hologram moonwalks.
9. JLo closes the show as only she can.