Mariah Carey was scheduled to film a cameo, however her scenes were never filmed. Will Farrell recalled that Carey showed up four hours late, then didn't want to do the scene she had agreed to do. Carey then delayed production as she didn't want to sing the song, one of her own, that she was supposed to sing. This would have required the legal department to clear the song. Carey also required her trailer to be filled with white flowers and stuffed animals of lambs. Carey's scene ultimately was not filmed.
Will Ferrel and Amy Poehler previously worked together ten years prior in Blades of Glory (2007).
Will Ferrell (Scott), Andy Buckley (Craig), Rob Huebel (Officer Chandler), and Randall Park (wall-street guy doing cocaine) have all appeared in The Office. Amy Poehler (Kate), Jason Mantzoukas (Frank), and Nick Kroll (Bob) have all appeared in Parks and Rec. Jason Mantzoukas has appeared in Brooklyn Nine-Nine. All three shows feature Michael Schur as a creator, writer or producer.
Jason Matzounkas and Amy Poehler have appeared together in Parks and Recreation (2015). Poehler played Leslie Knope and Matzounkas played Dennis Feinstein
Jason Mantzoukas and Nick Kroll were both previously on the League. Kroll played Ruxin and Mantzoukas played Rafi. Ruxin was married to Rafi's sister.
Amy Poehler and Nick Kroll appeared together in Parks and Recreation. Poehler played Leslie Knope and Kroll played The Douche.