At around the 14:56 mark, a character who looks and is dressed like Gene Belcher from Bob's Burgers is shown at the party. Writer Jim Dauterive worked on King of the Hill and is one of the creators of Bob's Burgers.
At around the 4:20 mark, the background guitar music plays two riffs that sound very similar to the theme song to Sanford and Son. Sanford and Son has been referenced in King of the Hill previously as one of Dale's favorite TV shows.