The title is a close and obvious reference from Saturday Night Live (1975)'s opening line "Live from New York, It's Saturday Night!"
150th episode of the series
The song Carly Rae Jepsen performs on SNT on the show, "I Really Like You", she also performed on SNL, the show that SNT is based on.
The cast photo of the 'Saturday Night Tonight' season that sucked is a actually photo of several of the real-life producers of Castle (2009).