Jimmy Fallon devoted his entire Thursday show to interviews with the cast of "30 Rock", which wraps up its seven-season run on January 31. Joining Fallon for the show were Tina Fey, Alec Baldwin, Tracy Morgan, Jane Krakowski and Jack McBrayer.

One of the highlights of the episode was a bittersweet, and uncharacteristically genuine, musical interlude by Tracy Morgan, who serenaded his fellow cast members with "It's So Hard To Say Goodbye To Yesterday" by Boyz II Men. Watch the clip above and try not to tear up just a little bit.

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