Como dizer "vazar (na internet)" em inglês

Amanda,

O seu contexto não é suficiente. Normalmente, "vazar" é expresso com "leak".

Lady Gaga's new single has leaked on the internet.

A expressão "vazar" is become known or available to the public. Algo que é colocado de uma forma impropria a disposição do publico.

O petroleo da CHEVRON não deveria sair daquela forma mais saiu então ele vazou, no sentido de derramar "to spill".

Lady Gaga's new single was leaked on the internet

Vamos aguardar mais sugestões.

How about....?

Viral video
From Wikipedia, the free encyclopedia

A viral video is one that becomes popular through the process of Internet sharing, typically through video sharing websites, social media and email.[1] Viral videos often contain humorous content and include televised comedy sketches, such as The Lonely Island's Lazy Sunday and Dick in a Box, amateur video clips like Star Wars Kid[2] the Numa Numa[3][4] videos, The Evolution of Dance,[5] Chocolate Rain[6] on YouTube; and web-only productions such as I Got a Crush... on Obama.[7] Some eyewitness events have also been caught on video and have "gone viral"[8] such as the Battle at Kruger.[9]

With the proliferation of camera phones,[10] many videos are being shot by amateurs on these devices. The availability of inexpensive video editing and publishing tools allows video shot on mobile phones to be edited and distributed virally, by email or website, and between phones by Bluetooth or MMS. These consumer-shot videos are typically non-commercial

To add to what Thomas quoted:

Internet Meme

List of internet phenomena