The Return of Robin Sparkles? Another Musical Ep? How I Met Your Mother Stars Dish Out Secrets

Stars of CBS hit sitcom try and guess the identity of Barney's bride

Is there anything better than seeing Cobie Smulders rocking it as Canadian teen sensation Robin Sparkles on How I Met Your Mother? No, eh? So when we recently hit the set to get scoop from her and castmembers Kal Penn, Alyson Hannigan and Jason Segel, we just had to bug them about Ms. Sparkles coming back to our TV lives.

Plus, it's baby time in the Erikson household! Who will be the best babysitter? And of course, the cast had way too much fun trying to guess the identity of Barney's (Neil Patrick Harris) future bride…

"Fingers crossed, I'd love to do more Robin Sparkles stuff," Smulders tells us about the return of the "Let's Go to the Mall" singer. "Those are some of my favorite episodes. We just have to get really creative as to how we bring her back, because it can't be like, 'What?! We found another one! Another video!'  The writers are geniuses and I'm sure if we do decide to bring her back, they'll find a really fun creative way. You know we've done it quite a few times. It'll be nice to do it at least one more time before the series is over."

Duh, Robin Sparkles has to come back for one last hurrah. Maybe she'll come back for Barney's wedding? Unless Robin is the bride, which is what all Barney-Robin fans want.  But Hannigan might not be in that camp. "I feel like Lily wouldn't want Barney to just settle down, which wouldn't be good," she says. "But I don't think she'd want Robin to go for Barney because Robin can do so much better than that."

Really? Because we think they belong together. But right now Robin is with Kevin, her therapist, played by the always-awesome Kal Penn. And pretty soon, Kevin is going to hit a rough patch in his relationship with Robin. "My character, Kevin, has to make up for something that he did that didn't go quite the way that everybody wanted, so he's basically painting the entire apartment here and trying to save face simultaneously," he said of the episode they were shooting.

Smulders added: "Lily and Marshall are having a baby and we're painting the nursery, and the whole episode is about mystery versus history. And it's about wanting to know, but also wanting there to be a little bit of secrecy to keep things interesting. So, it's sort of a battle of that in terms of finding out the gender of the child. Ted is having trouble Internet-searching on the web for a date, and so it's sort of in that same theme, we all sort of play our roles in it."

As for the most together couple on television, Lily and Marshall, the baby is going to change things for them, big time. "There is probably going to be less scenes in the bar," Segel tells us. But when the parents want the rare night out at MacLaren's, who will be babysitting? "Definitely not Barney," Hannigan says. "[And] definitely not Robin, she hates kids. So I guess Ted."

How I Met Your Mother airs Monday nights on CBS.