Mr. Popular is a recurring alter-ego of Buster Bunny. As Mr. Popular, he hosts his own television show where the audience asks him advice (which later usaully backfires). He is often seen wearing a white blazer, a red ascot, and dark sunglasses.
Buster appears as Mr. Popular in the episodes "Ask Mr. Popular", "Mr. Popular's Rules of Cool" and the third wraparound of "You Asked for It Again", just before the episode segment, Hold the Sugar. In the latter, he appears sans sunglasses.