"Let's do this"

[Laurence Horn]

When did this start?  I'm now hearing it as a tag on commercials, but judging from urbandictionary it's been around for awhile.  Here's a gloss and one of the cleaner cites:

A phrase which connotates the beginning or initiation of something fun, such as a party, club excursion, bar crawl, or the like.
Three people get into a cab on their way to a party. Prior to getting in, one of them says "Alright, let's do this!"

In my memory nobody has used this live in my hearing, but I could have missed it.

LH

------------------------------------------------------------
The American Dialect Society - http://www.americandialect.org