All of you How I Met Your Mother Fans probably have fond memories of the episode from 2006 where Robin revealed her darkest secret to the bunch; that she was, in fact, a Canadian teen pop star. We couldn't get enough of Robin Sparkles and her video "Lets Go to the Mall." But wait, because on tonight's episode we get to see another long lost video, "Sandcastles in the Sand," with cameos from James Van Der Beek, Alan Thicke and the original Pop Princess- Tiffany!