If the first-week predictions for Eminem‘s “The Marshall Mathers LP2″ are correct, maybe he’ll start smiling in photos. Yeah, we doubt it. According to Billboard.com, the Detroit emcee is on course to sell anywhere between 700,000-750,000 copies, making it the second largest debut this year. The first came from former boy bander (and enemy) Justin Timberlake for his “The 20/20 Experience” which sold 968,000. […]