Matthew Morrison & Darren Criss Duet On "Summer Rain"

As Matthew Morrison debuts his new album on iTunes today, he is getting some promotional help from the rest of the GLEE cast. Darren Criss helped out his co-star with a little impromptu duet of "Summer Rain," creating a lot of internet buzz on Tuesday. Watch it below.

Perez Hilton posted the video on his website, raving about the new single. But the celebrity blogger isn't the only one hyping up the new album and song.

Here is what several of the other cast members had to say in support of Matthew today:

Chord Overstreet: "Hey everybody check out my boy @Matt_Morrison album that just came out today!"

Dianna Agron: "Matty! RT @Matt_Morrison: The new album is out today on @iTunesMusic http://idj.to/kj8RDD !! Thank you everyone for the support!"

Cory Monteith: "@Matt_Morrison: The new album is out today on @iTunesMusic!! Thank you everyone for the support!"

Matthew thanked Darren for helping him promote the album tweeting: "Had a lot of fun playing with @DarrenCriss. He is an incredible singer & musician."