KELLY ROWLAND VISITS JASMINA, THE KID DYING FROM CANCER THAT RIHANNA IS TRYING TO HELP GET BONE MARROW.

Photo: Karen Detrick

Jasmina Anema, the spunky New York City girl who desperately needs a bone marrow transplant, loved the girly pink cupcakes and the Hello Kitty bicycle she got on her 6th birthday Wednesday. But she was "over the moon" when Grammy-winning singer Kelly Rowland sang "Happy Birthday" to her in her hospital room at NYU Medical Center.

"Kelly made me feel like a princess," Jasmina told PEOPLE Wednesday. "She made me feel so special."

Rowland had as much fun as Jasmina, who has a rare and deadly form of leukemia. "She made my day, to be quite honest," Rowland told PEOPLE. "It felt like a slumber party. She's so precious. She has such a beautiful spirit."

The former Destiny's Child star spent more than two hours with Jasmina and her best friend, Isabelle Huurman, 5. The trio frosted cupcakes, named Jasmina's new stuffed dog, Jazzilicous, and talked about The Little Mermaid's Ariel. "I'm 28 and I still love mermaids," Rowland told Jasmina, who was dressed in a tutu for her birthday bash. More at PEOPLE...