Madonna's 47th birthday celebration was marred Tuesday when she suffered several broken bones in a horse-riding accident at her country home outside London.

The star was treated and released from a hospital after sustaining three cracked ribs, a broken collarbone and a broken hand, according to Liz Rosenberg, her New York spokeswoman. Madonna's husband, director Guy Ritchie, took her to the hospital, Rosenberg said.

The accident occurred at Ashcombe house, the couple's 1,354-acre estate about 100 miles southwest of London.

Madonna and an assistant were riding when the entertainer, on a horse she wasn't accustomed to riding, took a tumble. Her children, Rocco and Lourdes, were at home but weren't with her, Rosenberg said.

"The whole family was out in the country, celebrating her birthday," Rosenberg said.

Rosenberg said she didn't know whether Madonna was returning to Ashcombe after her release from the hospital.

Horseback riding has been a relatively recent hobby for the star. "I think she had been riding for about four or five months," Rosenberg told the AP. "She's spent a lot of time riding when she was out in the country."

Madonna's latest album is scheduled for release in November. When asked if the mishap would affect the singer's plans to promote the album, Rosenberg quipped: "She's walking and talking. I don't know if she's going to be hanging from a disco ball anytime soon."

Madonna, with husband Guy Ritchie, was celebrating her 47th birthday.