Cobie Smulders Previews This Week's 'How I Met Your Mother' Robin Sparkles Episode (VIDEO)

Put on your jelly bracelets, and your cool graffiti coat -- it's time for another very special Robin Sparkles episode of 'How I Met Your Mother.'

Whether she's singing about going to the mall or building sandcastles (where else? In the sand people!), Robin Scherbatsky's '80s Canadian popstar self is a huge 'HIMYM' fan favorite. And how could she not be with lyrics like "You're good at pull-ups and have radical hair" and pals like Tiffany and a sassy robot.

I caught up Cobie Smulders, Robin Scherbatsky herself, to find out what Robin Sparkles is up to in this week's flashback episode (Monday, 8PM ET on CBS). Here's a hint: it involves the return of an '80s TV icon (who also happens to be Canadian), a Pussycat Doll and outerspace.

OK, now that's rad.