According to Ad Age magazine:

For a traditional ad campaign, generating millions of dollars in retail
sales of the product is the No. 1 goal. For a viral campaign, 1 million
YouTube views is the “magic number,” said Paul Kemp-Robertson,
editorial director at Contagious.
Smirnoff’s “Tea Partay” spot, for example, garnered 1.3 million YouTube
views in its first two months. The clip was a dead-on spoof of hip-hop
videos, featuring an all-rapping, sweater-and-polo-clad cast of
Martha’s Vineyard WASPs. 

Locker Room readers helped make it a hit. See it here if you missed it before.