Robin: Whoa. What happened to you?
Barney: We watched Robin Sparkles: Underneath the Tunes today.
Robin: Wait, what? You guys get MuchMusic down here?
Barney: And that video led me to...
[flashback to Barney being pummeled by Alan Thicke:]
Barney: I am engaged to Robin Scherbatsky and I know that she wrote "P.S. I Love You" for you. Now- Now, why is she so obsessed with you?
Alan Thicke: What? That song's not about me.
Barney: Then who is it "aboot"? About! Damn it!
Alan Thicke: I don't know. I always thought it was Coulier.
[on "Robin Sparkles: Underneath the Tunes":]
Dave Coulier: It wasn't me. Stop asking. Geez, cut it out.
Future Ted: [v.o.] [chuckles] I always liked that joke.