Click here to watch "Talk To Your Parents."

It's not marijuana. It's not cigarettes. It's John McCain. In one of its most specifically targeted efforts yet, MoveOn.org is urging young voters not to give into pressure to vote for the GOP candidate in an anti-drug parody ad, "Talk To Your Parents" (subscription).

The $150,000 ad buy is running on MTV and Comedy Central in university towns throughout North Carolina and Nevada as well as on nationwide cable during the CW series "Gossip Girl." Two actors from the show, Penn Badgley and Blake Lively, appear in the 30-second spot.

The ad plays off several familiar tropes from public service advertising to encourage young voters -- who polling suggests still lean strongly toward Barack Obama -- to talk with their parents and encourage them to support the Democrat. In the ad, Badgley holds up a McCain-Palin baseball cap that says "Drill Baby Drill!" "Mom? Dad? I found this in your room." A slew of young people then rattle off lines found in anti-drug ads. "Are you thinking about voting for John McCain?" one young person says, while another chimes in: "Just because other people your age are doing it, doesn't make it cool."

Peter Koechley, director of MoveOn’s young-voter outreach program, said the actors in "Gossip Girl" "speak extremely well" to the ad's targeted audience. He added that the spot aims to "break through the clutter and be sort of a funny ad, but with a serious message of getting young people to talk with their parents."

The ad is heavy on parody, but it doesn't address any specific issues. In response to that observation, Koechley said that the group doesn't need to win over its target audience to vote for Obama, they need to convince them to encourage their parents and others to do so as well.

"The basic point is that we're 25 days out and we don't need to convince our generation as much," Koechley said. "We're wholeheartedly behind Obama."