GLEE | The Final Countdown: Top 4 Mash-Ups - YouTube

https://www.youtube.com/watch?v=X7r5hIeNIT0&feature=player_detailpage

Becca Tobin introduces this week's fan-voted Top 4 favorite mashups of all time. Subscribe now for more Glee clips: http://www.youtube.com/subscription_cente...