Seven Deadly Sins (a.k.a. Gluttony) Blossom : Season 4 Episode 25

Two aliens in a flying saucer (voices of Joey Lawrence and Michael Stoyanov) choose the Russo home as the site for their observations of earthling behavior, particularly their susceptibility to the seven deadly sins, which are illustrated in encounters between the various characters. (This being a family sit-com, sloth gets the most airtime.)