Glee’s Darren Criss has done multiple covers of Katy Perry’s “Teenage Dream” before, but I bet none of you have heard him perform the song while drunk. Performing at Perez Hilton’s 33rd birthday party, it’s surprising how well he knows the lyrics while still in a drunken state.

Watch the amusing performance below:

In case you feel the need to listen to a sober version for a comparison: