Urlesque counts down the top 100 viral videos in the history of the web. These are the clips that are etched into our memories, made us laugh, influenced the future of internet video, or changed it altogether.

#100 - Bad Day

Bad Day was one of the first viral video clips to gain popularity online and has been circulating the web since 1997. Originally shot as a part of a marketing campaign, the video (also known as 'computer rage' or 'office rage') began to "go viral" when it was passed around via e-mail, and serves as an early example of viral video marketing done right -- intentionally or not. -KR

#99 - Scarlet Takes A Tumble

Set in Scarlet's Birmingham, Alabama home, Scarlet Takes a Tumble is one of the web's truly iconic blooper videos. From the get-go Scarlet distinguishes herself from the legions of tweens who've videotaped themselves singing -- it turns out Scarlet's actually got a good voice. Not content to simply ride on her chops, she struts around the room, gets up on the table, and well, let's just say she "broke a leg." Don't miss her reaction video for a behind the scenes look. -JB

#98 - Roomba Driver (Cat on a Roomba)

What is there really to say about this clip of a cat riding on a robotic Roomba vaccuum cleaner? Its origins are mysterious, but it was only a matter of time before someone put a living being on the dirt-sucking roving-robot, filmed it and uploaded to YouTube. What separates this particular ride from the rest is the cat's grace and confindence atop the erratic beast. Related viral hits? Chimpanzee on a Segway. Kittens on a Roomba. Baby on a Roomba. I think I'm seeing a trend here. -LW

#97 - Worst Day of My Life (Crying Idol Girls)

Sometimes the Internet is just all about watching other people cry. That's why, when this surveillance-esque video entitled, "Worst Day Of My Life" popped up on YouTube, the world immediately took notice. Showing the sincere reactions of a group of David Archuletta fans reacting to his shocking loss on American Idol, the clip got millions of views before its debut on the actual American Idol show. Related cry babies: Sanjaya's biggest (crying) fan, Crying Giants Fan, Crying Sorority Girl -LW

#96 - Lip Dub - Flagpole Sitta by Harvey Danger

Lip syncing to your favorite song on video sounds like a simple enough concept, right? Well, the staff at Connected Ventures took it up a notch when they choreographed a one-take video in which the entire office participated in cover of Harvey Danger's 'Flagpole Sitta,' without having to sing an actual note. Copycats surfaced, and soon enough, the "lip dub" was a meme. -EG