I think it's either the ron ron or simple. Check the CL website...they have a glitter fifi you can compare to. Ebay might also have some glitter ron rons, simples, and fifis as well. Just make sure you have them authenticated before purchasing. We have a good thread for that.
CL Link: http://us.christianlouboutin.com/shoes.html?p=6
As sakura mentioned, it's the Ron Ron. Also, the Fifi you referred to is not glitter; it's strass. To my knowledge, there is no glitter Fifi.
Also, the shoe in question is not available for purchase as it's an older style so it is not available on CL.com.