Christina Aguilera poses for photographers and signs autographs outside the Larry King Live show in Hollywood on Wednesday.

The 27-year-old pop princess appeared on Larry King Live to discuss her public service announcement with Rock the Vote. Christina and her five month old son Max Liron star in a new Rock The Vote campaign ad to premiere this month.

Rock the Vote has tried since its inception to use pop culture to prod young people to vote.

As the ad closes, Aguilera looks up at the camera and says “It's time to make history. It's time to rock the vote.”