Future Ted: [v.o.] It was true. Marshall had become addicted to creating songs and photo montages documenting various mundane events. So for months, all of Marshall's friends and professional colleagues were getting e-mails like this...
[Ted plays a series of video montages from Marshall featuring songs]
Marshall: [singing] Ordered Chinese food today Some moo shu pork sauce got away Flipped the cushion, Now everything's okay.
Marshall: [singing] Cat sitting for Lily's mom, Cat sitting for Lily's mom, It's gonna be fun, It's gonna bring us all closer together. [In one of the pictures, the cat is seen climbing out the window]
Marshall: [singing] Cat funeral, Cat funeral, It was an accident And not entirely my fault, Cat funeral, Meow, meow, meow, meow, Cat funeral, meow, meow, meow, meow. We'll miss you, Whiskers. Meow, meow, meow, meow, meow...

[theme song to Barney Stinson's resume:]
Barney: [singing] Barney Stinson Barney Stinson That guy's awesome Awesome He's so awesome He's so awesome Oh, so awesome Awesome This isn't Barney Stinson Singing this song That would be really lame One of the many admirers Who think that guy is awesome References available Oh, oh, oh, oh, oh Awesome, awesome Oh, oh, oh, oh, oh Awesome He's from awesome town Oh, oh, oh, oh, oh Awesome

Marshall: That's three! Thanks, baby, you're the best. And as a special, added bonus, I've composed a song just for this occasion. Ted, lights!
[Marshall starts playing the piano]
Marshall: [singing] What is this feelin' that's put you in your place A hot, red burnin' on the side of your face you feel the blood rush to your cheek. Tears start to fill your eyes and your lips are tremblin' but you can't speak, you're tryin', Oh, you're tryin' not to cry! You just got slapped [Barney adds "Oh, oh"] Across the face, my friend [Barney adds "Oh, oh, oh"] You just got slapped. Yes, that really just happened. Everybody saw it and everybody laughed and clapped, it was awesome. Wait, you just got... slapped. Happy Slapsgiving, everybody.

Robin: Okay, you guys know how my mornings usually go.
Marshall: Why would we care how...
Robin: Usually it's like this.
[fantasy scene of Robin queuing:]
Man #1: After you.
Robin: Aw, thank you.
Man #2: On the house, Robin!
Man #3: [all singing] Take this bagel on the house
Man #4: Have a paper on the house
Man #5: I'd give you a house on the house if I could
All: You're so beautiful Everything in life should be free
Robin: It's so wonderful to be me!
[reality:]
Lily: Wow. Do Do little bluebirds help you get dressed in the morning, too?
[fantasy:]
All: She's exaggerating to make a point!

Marshall: [singing] As Marshall ran with all his might And passed his friend Christine
Marshall: Hey, Christine.
Marshall: [singing] He thought of all the times That he had beaten the machine. He triumphed over "Pitfall"
Young Marshall: Yes!
Marshall: [singing] He vanquished the alarm
Marshall: Yes!
Marshall: [singing] He brought the jukebox back to life With his Fonzarelli arm Marshall vs. the machines

Future Ted: [v.o.] To this day, Robin and Barney swear this is the song they danced to that night.
Singer: [singing] You fooled around on your baby Now the least you could do is to tell her the truth Yes, you in the suit Or that secret will eat up your soul Girl, the guilt's gonna drive you crazy Crazy You can't live with this lie, Kevin's such a nice guy Gotta tell him tonight Tell them right here on this boat You're like scum round the edge of a toilet bowl Flush What the hell is in the place where you should have a soul? Slut You did these two wrong Don't wait too long In fact, you know what? Tell them right during this song Tell ', tell 'em, tell 'em, tell 'em, tell 'em I'll wait. Tell 'em, tell 'em, tell 'em, tell 'em, tell 'em Oh, come on, seriously, you're not gonna tell them?
[later:]
Barney: We have to tell them.
Robin: Right now.
Singer: Sure, act like it was your idea. Seriously, you guys suck.

Ted: Come on, they just got excited. They've been looking for couple best friends forever. Plus, I'm sure they weren't that bad.
Robin: Show him.
Barney: This is a web site Marshall already made about last night. It's called itwasthebestnightever.com.
[on the video, Marshall sings a song while a montage of photographs from the night are displayed:]
Marshall: [singing] It was the best night ever Laughter raining down Like April showers Oh, we talked for hours... best night ever...
Ted: Oh, that's not good.
Marshall: [singing on video] Then we played charades. Lily made some creme brulee, lay-lay-lay-lay And now that we're best couple friends There's only one thing left to say... Are you free? Are you free? Are you free? Are you free? Are you free next Saturday? [speaking] That's the 17th. [singing] Are you free? [speaking] Friday or Sunday would also work. Or basically any other day.
Barney: Needless to say, we've both changed our e-mail addresses.