“Only You Can Silence Yourself.”

Jessica Alba has appeared topless and bound with black tape in a buzzed-about new SM-inspired ad part for a non-profit organization dedicated to getting young people registered to vote.

The sexy Sin City star is photographed crying, bound, and gagged with shiny black tape over her mouth and chest in the provocative new ad for Declare Yourself.

The ad reads “Only You Can Silence Yourself.”