After a lot of looking around, I cannot locate this video. Oddly, I found a totally different b&w clip of something that billed itself as the "official video" of this remix (except it seems it's a different remix of the same song by the same remixers, without the participation of Zoe Kypri). Needless to say, no messy action in that one.
I did, however, find this description of the pie/food fight in the other video:
"As a bonus, the revision comes with the above clip, which documents the artful unraveling of a wedding, often in slow-motion. Okay, it's not that artful it's actually quite messy, and the reason for the camera tricks explains it all. After the bride shoves some dessert in her mate's face, an incredible food fight breaks out. Duck!"
Also found a couple of screencaps that suggest there's at least one great pie hit in this missing video. At the bottom are some other, clean photos of the singer in this remix, who would seem to be the pie victim below.
If anyone with deep internet search skills (I certainly don't have these) wants to look further for this video, here's a tip: Although the remix is technically called "No I Turn You On," the original song it is based on is actually called "Please Don't Turn Me On" and I found a number of references to the remix calling by that name rather than "No I Turn You On." So if you're digging around for this, be sure to search under both names.