After a self-imposed several year hiatus to raise her children, Jennifer Lopez is trying to reclaim her spot in Hollywood’s pecking order with the romantic comedy The Back-Up Plan.  The movie opens Friday, and J-Lo talks about getting back into the showbiz grind, and since she’s a bit of a workaholic, it doesn’t really phase the Bronx native. (CLICK ON THE MEDIA BAR BELOW TO HEAR JENNIFER LOPEZ)