Isaac, Taylor and Zac Hanson are famous for their flawless harmonies and catchy, pop-rock tunes, so it’s no wonder they befriended cast members of FOX’s musical sitcom, ‘Glee.’ The brothers hung out with Matthew Morrison and Darren Criss last weekend, and there are tweets and pictures to prove it!

Instagram photo from a hang session with Morrison, who was recently recruited by

Then, late last night, Hanson launched a surprise live video stream on their
website and played a couple of songs from their forthcoming album, ‘
ANTHEM.’ During their performance of the disc’s lead single, ‘
Get the Girl Back,’ Criss joined them onstage to add his smooth vocals to the tune.

Twitter and expressed his excitement about crashing Hanson's rehearsal:

At the end of the video stream, Taylor named Criss “the new fourth Hanson,” which left us dying to know if we can expect a Hanson + ‘Glee’ collaboration in the future. In the meantime, be sure to tune in to 'The Tonight Show With Jay Leno' tomorrow night (April 9) to watch the talented trio perform their new single!

Watch Darren Criss Perform With Hanson