With only 33 more days until the election, celebs are doing everything they can to encourage young voters to get involved. Jessica Alba has already been seen in two shocking ads wearing a muzzle for Declare Yourself, a nonprofit campaign which aims to empower every 18-year-old voter to vote. Now, she has paired up with another young star for the newest vid!

Hayden Panettiere joins Jessica for the cause by hosting a mock home-shopping show selling "The Muzzler." Hayden praises the product's ability to mute voters' voices and silence their opinions when it comes to the election.

"Jessica and Hayden have an amazing ability to connect with young adults," Marc Morgenstern, executive director of Declare Yourself, said in a statement. "Behind all the humor of the PSA lies a very serious message of what it actually means to sit out the election and effectively silence oneself."

What do you think of celeb PSAs? Are they effective? Sound off now!