In Kim's flashback she asks Scott to draw her a sheep. This is a reference to Antoine de Saint-Exupéry's The Little Prince.
An earlier submission incorrectly stated that the song scatted by Roxie was from Nyan Cat; it is actually "Whistle Stop" by Roger Miller (1973) from the Robin Hood soundtrack. Perhaps the OP was thinking of the Hamster Dance web animation from 1998, which sampled a sped up version of Miller's song.