First, the good news: Up All Night Season 2 will be extended by five episodes and air 16 in total.

Now, the very unusual news: the Christina Applegate/Will Arnett sitcom will go on a three-month hiatus following episode number-11 and return in the spring... in an entirely new format.

NBC has announced that the series will move from single-camera format to multi-camera, meaning it will be shot in front of a live studio audience when it returns in the spring.

"This was an idea we and [executive producer Lorne Michaels] came to in order to infuse the show with more energy,” said NBC entertainment chairman Bob Greenblatt. “We know what the multi-camera audience does for the live episodes of 30 Rock, plus after seeing both [Up All Night co-stars] Maya [Rudolph] and Christina [Applegate] do SNL within the past few months, we knew we had the kind of performers - Will Arnett included - who love the reaction from a live audience.

"We think we can make a seamless tradition to the new format. Also, we’re committed to the multi-camera form and this will give us another show to consider for next season in this new format.”

What do you make us this unprecedented move, TV Fanatics?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.