Glee-- Happy Birthday, Blaine!

Music in this Video: "Not Alone" Written and Performed by Darren Criss "You Have More Friends Than You Know" Written by Mervyn Warren and Jeff Marx Performed by Darren Criss (Blaine Anderson), Chord Overstreet (Sam Evans), Melissa Benoist (Marley Rose) and Alex Newell (Wade "Unique" Adams) "Teenage Dream" Originally Performed and Written by Katy Perry Co-Wrote by Max Martin, Bonnie McKee and Lucasz Gottwald Performed by Darren Criss (as Blaine Anderson)