Now, not everyone is comfortable wearing knock-offs. I say, as long as YOU are not the knock-off, work 'em girl!
The little ladies I found today that are dangerously close to Louboutin boots worn by one Ms. Posh Spice, are located here: http://www.lovemyshoes.com/products2.cfm/id/24469/item/PANAMA----by-GO%20MAX
Now, do not think for one second that these cuties will last as long as a true Louboutin, but come on, for $21.97, you can wear them once and then who cares what happens to them!
For now, wear them and feel Posh-y!