Beyoncé canceled a Belgium concert for her Mrs. Carter tour on Tuesday, adding to mounting rumors that the singer and husband Jay-Z are pregnant with their second baby. Beyoncé was scheduled to perform at the Sportpaleis in Antwerp, but cited “dehydration and exhaustion” as the reasons for the cancelation, while adding that doctors have advised her to rest.

Furthering chatter that Beyoncé is pregnant, her publicist said “she is awaiting word from her doctors before making a decision” to perform a concert at the same arena on Wednesday. Bey kicked off her Mrs. Carter World Tour last month in Serbia, and the worldwide performances will conclude in New York at the Brooklyn Barclays Center.

Beyoncé and Blue Ivy Beyoncé fueled rumors that she is pregnant with her second child after revealing that she wanted to make daughter Blue Ivy a big sister.

While Beyoncé has promised to reschedule the canceled tour date, she has remained tight-lipped about a potential pregnancy despite growing speculation. Reps for the singer have yet to comment on baby on the way, yet inside sources insisting Beyoncé is pregnant said that she and Jay-Z may be saving the announcement for a sensational moment a la daughter Blue Ivy’s MTV Music Awards reveal.

Beyoncé has been vocal about wanting a second child, and recently admitted that she would like a sibling for 1-year-old Blue Ivy. “I would like more children. I think my daughter needs some company. I definitely love being a big sister,” Bey said, referring to her showbiz sis, Solange Knowles. Although she didn’t reveal when she would like to become pregnant, her reply may indicate it may be sooner than later. “At some point, when it’s supposed to happen,” Beyoncé coyly said.

Beyoncé's Met Gala Dress The Givenchy gown that Beyoncé wore to the Met Ball was apparently specifically designed to conceal her baby bump with a high-waist and strategically placed belt.

Pregnancy rumors were seemingly solidified when Beyoncé wore a high-waisted Givenchy gown to this month’s Met Gala. According to sources, the intricate dress carefully hid her baby bump by using structured fabric and a precisely placed belt that diverted attention from her midsection and smoothed out her rounded belly. Those in attendance at the fashion-forward event noted that Beyoncé suspiciously passed on alcoholic beverages.

Following the Met Ball, concert-goers snapped photos of Mrs. Carter while giving concert performances, in what seems to undoubtedly reveal a bump beneath her form-fitting costumes. Fan pictures show Sasha Fierce outfitted in a sparkly blue jumpsuit, sporting an uncharacteristically large belly that certainly resembled that of a pregnant woman. Beyoncé banned photographers from her world tour in early May, perhaps to prevent pictures of her baby bump from leaking to the public.

Click here to see photos of Beyoncé’s Baby Bump!