On April 8, 2000, a Saturday Night Live sketch starring Will Ferrell and Christopher Walken featured 1970s band Blue Oyster Cult in the recording studio cutting their big hit, 'Don't Fear the Reaper'. Walken plays the hotshot record producer who's convinced the success of the track depends on how much cowbell (the cowbell played with abandon by Ferrell) can be put into the mix.
YouTube's most popular clips revealed
Largely because of this viral video, Generation Y kids could be heard uttering 'more cowbell' to each other and giggling in shopping malls across America in 2004.
The worst newscaster in history
It was young Brian Collins' first night on the sports desk. The teleprompter malfunctioned. The teleprompter started rolling too fast. This viral video is a painful (and funny) recording of what happened as a result: one of the biggest broadcast bloopers ever.
The video became so popular that Collins appeared on various TV shows in the US, including the CBS Early Show and the David Letterman Show. ESPN did a story about him too.
Chocolate Rain by Tay Zonday
Tay Zonday is a graduate student from Minneapolis, Minnesota. His YouTube song and video, 'Chocolate Rain', is a little odd, but strangely appealing, and became very popular very quickly in the Summer of 2007. This led to appearances on VH1's Best Week Ever show and the Jimmy Kimmel Live show.
The song's not bad, and the lyrics are cool, but it's the strangeness factor (his head movements, his short body and low voice) that makes this viral video click.
High drama: The dramatic hamster
Millions of people have watched this 5-second video, which consists of a zoom shot of a hamster in a cage as it turns around and looks wide-eyed at the camera.
It's unclear who the original author of the video is, but 'Dramatic Hamster' is one of the most remixed videos on the web. One remixer gave the hamster a James Bond theme, somebody else added a Kill Bill touch - and the possibilities go on from there.