Mega-cosmetics company Lancome, in collaboration with Polyvore, has created the brilliant Lancome Facebook app.

While campaign, with its virtual makeover tool, is not necessarily unique, it features a usability that makes it special. The user has the choice of how intense the makeup can be, and can view how-to videos and Lancome commercials.

The Lancome Facebook app also offers a 10-day sweepstakes for the launch of Lancome's 10 new palettes. Further, the collaboration with Polyvore asks the competitors to create 10 looks to complement the palettes.

The Lancome Facebook app is a great way to not only learn some great makeup tips but to also preview the collection without having to go to the makeup counter. This app is a must-see and must-use for any makeup junkie.