 Among the songs performed by Mouse Rat in " Galentine 's Day " were " The Way You Look Tonight " , originally performed by Fred <unk> in the 1936 film , Swing Time . Andy 's <unk> suggests he sings the " Let 's Call the Whole Thing Off " more like jazz musician and <unk> Louis Armstrong , who Andy admits he has never heard of . Andy and his band also performs " I Only Have Eyes for You " and " I 've Got You Under My Skin " . Leslie said reuniting Marlene and Frank would be like reuniting Romeo and Juliet , the protagonists of the William Shakespeare play of the same name , or reuniting actress Jennifer Aniston and actor Brad Pitt . She also warns to the camera for Aniston to " stay away from John Mayer " , the musician who previously dated Aniston . In the days prior to the original broadcast of " Galentine 's Day " , Mayer publicly apologized for a number of explicit sexual and racial comments he had made in the past months , which prompted news outlets to praise Parks and Recreation for the <unk> of their Mayer joke . Ironically , in May 2011 , Jennifer Aniston started dating Justin Theroux , who guest starred in the episode , and they later married . Frank made a reference to a recurring gag from Arrested Development when , after being rejected , he announced to Marlene , " take one last look ... because you 'll never see this body again . " 
