LATimes Reports Beyonce has canceled a show in Belgium, citing dehydration and exhaustion as  rumors of a second pregnancy continue to swirl around the pop diva. Beyonce “Loves Being Crazy Fat”…Click Here  The singer, 31, was advised by doctors to rest and will be missing her Tuesday show at Sportpaleis in Antwerp. The show will be get another date and tickets can be reused on the rescheduled day, her publicist told the Associated Press in a statement. Jay Z “Melts when Blue says Papa”…Click Here  Beyonce, who launched the powerhouse “The Mrs. Carter Show” world tour last month in Belgrade, Serbia, is also waiting on word from doctors to decide whether she’ll appear at her second…