The Populars are a clique in the KaBlam! short The Off-Beats. They are the clique popular kids, usually seen traveling in a huge nose-in-the-air clump, led by Tina. Whenever they come across an adult, they all put on phony smiles and pretend to be really nice. But Grubby Groo knows that they're just hiding their evilness. The Populars not only walk together, but they sleep and live together as well and each individual is qualified a bathroom break allowing separation of the group to commence, this is how Beth was able to talk to Tommy without getting into trouble.
The Populars seemed to be the inspiration for the antagonists, The Delightful Children from Down The Lane on the Cartoon Network show Codename: Kids Next Door, which Mo Willems had wrote episodes for.