​​​ "Saturday Night Live" spent three and a half hours celebrating itself last night, showcasing some classic moments drawn from its 40 year history, along with a few new sketches (why "The Californians"? Why?). Many current and former cast members got a moment to shine, and it seems only fitting that Andy Samberg showed up to do a digital short. He shared the screen with Adam Sandler for a song about the long and storied tradition of "SNL" cast members giggling during sketches. The duo also used the moment to rag on their own policy of smiling during sketches. We're hoping Jimmy Fallon and Horatio Sanz enjoyed the song, in particular, since they made frequent appearances in it. Watch the whole video below.