Greetings from the Dark Side~!
I made a brief post on my Facebook about this possible product dupe. I thought I would post it here anyways for those who do not follow me on Facebook. I found that a product I owned was a really good dupe for the 'Black Swan' pearlglide pencil liner from the new MAC Archie's Girls collection. The MAC pencil costs $16.50 while the Rimmel ScandalEyes is about $3-$5.
As you can see below, the two pencils are both black with silver sparkles. The MAC one (on the right) is a bit creamier and more intense than the Rimmel one (on the left), but they are very close. Plus, when they are worn on the eyes, they look almost identical. $16.50 for a product I could get for 4 times less money was not worth it for me. I immediately returned 'Black Swan'. So if you missed out on 'Black Swan' or thought it was too expensive, now you have an alternative dupe :)