Mariah Carey is gearing up on birthing a child with hubby Nick Cannon. Mariah,caught here hosting an evening out at the Bank Nightclub indoors at the Bellagio Resort in Las Vegas the other night, has set off rumors she maybe is pregnant by appearing a trace more bustier than usual over the preceding few weeks. It appears she has heaped on a few pounds. A pal stated, "Mariah appeared outstanding, only she appeared to have put on a couple of pounds. "Perhaps she is pregnant or at any rate preparing on that!” A different source contributed: "They have been trying on their trips, and Mariah has gone through her ob-gyn numerous times lately in California and not exactly for medical exams."