The 5 Most Successful Viral Videos Ever

Susan Boyle performing on "Britain's Got Talent" in 2009. A clip of her performance went viral.
Susan Boyle performing on "Britain's Got Talent" in 2009. A clip of her performance went viral.
(Image credit: YouTube | UKAdvertChannel)

From among the 10 years' worth of footage uploaded to YouTube every day, a lucky video will occasionally rise up from the masses, skyrocketing to fame and earning the title of "viral video." This modern phenomenon — rumor-spreading for the Internet age — has come to play a central role in shaping the collective consciousness.

But since the birth of YouTube in 2005, which viral videos have spread faster and farther than all others? Visible Measures, a Boston-based company that analyzes online video performance, has crunched the numbers to find out. Defining a video's virulence as the impromptu speed with which it and the videos responding to it collectively rack up 100 million views — and leaving out commercially produced music videos and video game trailers (as their release is often hotly anticipated) — here is a countdown of the five most virulent viral videos ever. [Watch All Top 10 Viral Videos]

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Natalie Wolchover

Natalie Wolchover was a staff writer for Live Science from 2010 to 2012 and is currently a senior physics writer and editor for Quanta Magazine. She holds a bachelor's degree in physics from Tufts University and has studied physics at the University of California, Berkeley. Along with the staff of Quanta, Wolchover won the 2022 Pulitzer Prize for explanatory writing for her work on the building of the James Webb Space Telescope. Her work has also appeared in the The Best American Science and Nature Writing and The Best Writing on Mathematics, Nature, The New Yorker and Popular Science. She was the 2016 winner of the  Evert Clark/Seth Payne Award, an annual prize for young science journalists, as well as the winner of the 2017 Science Communication Award for the American Institute of Physics.