We are one week away from the premiere of Glee Season 4.

And while fans are buzzing over the future of Finchel; the identity of Sue's baby daddy; and the new characters set to popular New Directions, we all know what drives this Fox comedy for most viewers: the music.

So let's sample a few upcoming tracks, shall we? We begin with Kate Hudson, as NYADA instructor Cassandra July, mashing up Jennifer Lopez/Lady Gaga on "Dance Again/ Americano."

Darren Criss will also take on "It's Time" by Imagine Dragons on the opening episode.

From there, Criss will make like Justin Bieber - to Kevin McHale's Britney Spears - for a combination of "Boyfriend/Boys." Listen now:

It's then Brittany doing Britney again, bitch, as Heather Morris goes all "Britney 2.0" for this rendition of "Gimme More."

Finally, the the new New Directions come together on the biggest song of 2012. Yes, it's "Call Me Maybe." What do you think of the show's take?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.