Sometime around 2003, an advertising rep acting on behalf of Unilever (formerly Lever Brothers), makers of Dove shampoo and soap, among other things, asked Warner Brothers if they could borrow some of the classic Hanna Barbera characters for an ad campaign. The end result is this gem, which helped introduce the shampoo as the latest addition to the Dove brand (along with soap and dish detergent). This would be the only time we'd see Jane Jetson, Wilma Flintstone, & Velma Dinkley in the same ad, pitching the same product.
For the record, Mindy Cohn (ex-Facts of Life), who had just been cast as Velma for WB's What's New Scooby-Doo a year earlier, essays the role here. Uploaded by Scooby317:
Like, they couldn't get Daphne for this gig? What about Penelope Pitstop?