Have you been missing those references to Scherbatsky's Canadian life? If you know what I'm talking about then you'll be overjoyed to know that on April 21, How I Met Your Mother will be all about Robin Sparkles, Robin Scherbatsky's alter-ego teen singing star. The entire episode is planned as a flashback to the 1980s 1990's when Robin became a one-hit wonder with the song "Let's Go to the Mall." Well, it turns out that wasn't her only song. Carter Bays and Craig Thomas, How I Met Your Mother's co-creators, composed a ballad. "Sandcastles in the Sand" was the flip-side of "Let's Go to the Mall." It's supposedly in the style of a power break-up ballad, like "Foolish Beat" and "Toy Soldiers."