The Frosty Four is a penguin Barbershop quartet that appear in the 2002 Sesame Street video Bert & Ernie's Word Play.
Benny Rabbit brings the penguins backstage to audition for the closing act as a replacement for the no-show, Ho-ho the Great Pie-Guy. They perform a song about keeping cool for Prairie Dawn, but when they start dancing, they fail to see the "Slippery" sign hanging from a shelf and slip around the floor, knocking Prairie into some props. They decline the job due to the slippery conditions.
Benny discovered the group performing in Sheboygan.
The lead singer is performed by Steve Whitmire, with back-up by Kevin Clash, Fran Brill and Stephanie D'Abruzzo.