I was surprised to see on Muppet Wiki that Bert also shows up in the new Rubber Duckie. Does he sing a line?
I saw a few images from the segment and saw that Ernie and Bert appear in a CGI/illustrated room. It's a shame they didn't use their old set.... But I wonder the Ernie and Bert apartment set still exists (might be a topic for another thread).
The big thing about this episode for me was the exclusion of a recurring segment (Smart Cookies, Super Grover 2.0, Murray Has a Little Lamb, etc.), because they were otherwise able to include a lot more in the half hour.
I agree completely. It was nice that they filled the time with celebrities singing a classic SS song that we all know and love. Plus Billy really had a chance to shine as Ernie in this ep. Kee hee hee hee!