According to the NY Post, she could be. Below is how they are reporting it...
Music insiders are chattering about Beyoncé expecting her second child with husband Jay-Z. Multiple sources told us after the Met Gala last week that the singer, who is currently in the middle of a world tour, is pregnant. Bey wore a Givenchy gown with a high, belted waist that carefully camouflaged her midsection, but pictures have emerged on blogs of what looks like a baby bump from recent tour dates.
Spot the supposed baby bump on the right photo. It could just be a lot of food tho :-)