Beyonce apologises for cancelling Belgium gig amid pregnancy rumours

Beyonce has posted an image of a handwritten apology letter online for cancelling the Belgium concert of her 'Mrs Carter Show' tour.

The 31-year-old rock star, who pulled out of the show citing exhaustion and dehydration, apologised to her fans for any disappointment she has caused and thanked them for their support, the Mirror reported.

She wrote: "Thank you for your concern. I'm feeling much better now and I'm ready to give you a great show."

The singer will hit the stage of the Sportpaleis Arena in Antwerp on Wednesday night.

The news came after speculation mounted that the 'Baby Boy' singer may be pregnant with her second child with husband Jay-Z.