AUDIO: Full Songs From GLEE's 'Comeback' Episode: RENT, Justin Bieber, and More!

On Tuesday's episode of GLEE, the members of New Directions take on pop phenomenon Justin Bieber, "Take Me or Leave Me" from Rent, and more! Listen to the full songs below!

To date over 13 million GLEE songs have been digitally downloaded, with over 5 million albums sold worldwide. GLEE scored three consecutive #1 releases with GLEE: The Music, Volume 3 Showstoppers, GLEE: The Music, The Power of Madonna and GLEE: The Music, Journey To Regionals. This week four GLEE releases occupy slots within Billboard's top 100 best selling albums Glee: The Music, Volume 3 Showstoppers at #31, Glee: The Music, Volume 1 at #58, GLEE: The Music, Journey To Regionals at #66 and GLEE: The Music, Volume 2 at #81. With all the excitement around Glee's return, it's evident why the New York Times proclaimed GLEE is now a bonafide phenomenon."