The 29-year-old singer's Rottweiler Missy was taken seriously ill with internal bleeding on Thursday, and she announced on her Facebook page that she would be pulling out of the Caribbean shows.
"I am very sad to announce that I have to postpone the show in Barbados and also Trinidad and Tobago. Hopefully I will be able to return in time for the gig in Venezuela if all is well," she wrote in the emotional post.
"Last night my dog Missy got rushed to the vets with internal bleeding, I was told she could have only a few hours to live. Luckily she made it through the night and they are now working hard to find out what is wrong and save her.
Pleading with her fans to pray for her dog, the "Super Duper Love" hitmaker continued, "Please say a prayer for missy. I don't know what I will do if she is not around. I can't bare the thought. Please say a prayer even if you don't believe in God, just put out some good energy for her."