Stop the singing
I actually like the show a lot. I can even live with the live (though Id prefer they went back to taped) but the singing needs to go. Im pretty sure that in any group of friends if you had a dude that broke into song half the time most people would have told him "STFU" by now. I find it annoying and detracts from the show.
I also noticed that "Ground Floor" never had this problem EXCEPT in the episodes Brent Morin were in. We get it dude, you can sing. Now you are annoying.