For weeks, speculation has been swirling that Beyonce is pregnant again, and now TMZ thinks it has near-definitive proof in the form of "breaking news." Bey just canceled a Belgium concert due to "dehydration and exhaustion," or, as TMZ puts it, "What you tell the media when you don't want to tell the truth." Her rep says Beyonce is waiting for "word from her doctors" before making further decisions. More pregnancy "proof" that has been emerging, plus the inevitable naysayers: