'How I Met Your Mother' may have only just returned with its 2013 premiere "Band or DJ," and has even more engagement shenanigans planned for Monday's "Ring Up," but one upcoming episode we're most excited for will see the long-awaited return of Robin Sparkles! Earlier CBS announced that a cavalcade of Canadian guest stars would make an appearance in the return outing, but now we've learned what will bring such major maple-leafers out of the woodwork! Find out how Robin Sparkles returns to "How I Met Your Mother" inside!

Only utilized sparingly, Robin Sparkles has long represented one of 'How I Met Your Mother's best recurring gags, and Robin Scherbatsky (Cobie Smulders)' alter-ego might have her best outing yet in upcoming 'How I Met Your Mother' episode "P.S. I Love You." CBS has issued its official press release for the February 4 episode, which clarifies its impressive amount of amount of Canadian guest stars as...a "Behind the Music"-style documentary about Robin Sparkles!

From CBS:

“P.S. I Love You” —Barney uncovers the lost episode of Robin’s “Underneath the Tunes” as Robin Sparkles. Meanwhile, Marshall and Lily are concerned that Ted’s new girlfriend is a stalker.

As previously announced, 'Growing Pains' star Alan Thicke, ‘Late Show’ bandleader Paul Shaffer, ’90210′ hunk Jason Priestley, ‘Jeopardy’s Alex Trebek, K.D. Lang, Barenaked Ladies frontman Steven Page, Rush frontman Getty Lee and Canadian former hockey star Luc Robitaille will all appear as themselves, while 'Dawson's Creek's James Van Der Beek' will reprise his role as Robin's old boyfriend Simon. Canadian actor Dave Thomas will portray music agent Chuck Gerusi, while 'SNL' vet and Chris Elliot's daughter Abby Elliot will appear as Ted's new girlfriend Jeanette.

Well, what say you? Will Robin Sparkles' "P.S. I Love You" return unlock an important new piece of 'How I Met Your Mother's mythology? Will anything change now that CBS is soon to announce a ninth season of the series? Give us your 'How I Met Your Mother' predictions in the comments!