How could something as perfect as a Alyson Hannigan sex tape exist? The unfortunate truth is that at this time the Alyson Hannigan sex tape is no where to be found. Small rumors have circled the star of “Buffy,” “How I Met Your Mother,” and “American Pie” may have produced a sex video. But lacking the video it self these rumors have dissipated. Luckily there are still plenty of pictures of sexual celebrities like Alyson Hannigan.