Eminem's newest collaboration with Rihanna was always expected to be huge, but this week it got a pretty surprising second wind. 

"The Monster" had a 123% sales increase in the last seven days, giving it the biggest sales week yet for the single, which officially dropped back in October. Apparently, the huge increase in sales can be attributed mainly to iTunes gift card purchases.

The track wa spurchased a total of 433,000 times, an impressive gain on it's first and biggest sales week, which only managed to move 373,000 units.

Mike WiLL Made It also saw an increase of sales for "23" in the week following Christmas, with 171,000 downloads (again, its highest selling week thus far).

Watch the video for "The Monster" below.