NEW YORK (Reuters) - Britney Spears says her sixth album will be out within nine months as the U.S. pop star seeks to rebound from troubling behavior and hospital stints for psychiatric evaluations.

In an interview with OK! magazine released on Wednesday, the 26-year-old says she has written more for the new album than her previous five studio albums, and describes it as having an "urban" feel.

"I'm writing every day, right here at the piano," said Spears, one of the world's most successful pop stars of the early 2000s. Her last album, "Blackout," debuted at No. 2 on Billboard 200 last November, but quickly slid down the chart.

Spears has given few interviews in recent years as her life spiraled out of control and she lost custody of her two sons.

Over the past 18 months she has been involved in an ugly divorce from Kevin Federline, entered rehab treatment several times, and exhibited erratic behavior like shaving her head and attacking a photographer's car with an umbrella.

But in the past six months, her father Jamie Spears has taken over management of her affairs and she has also been mentioned as a possible Emmy award nominee for guest appearances on U.S. TV series "How I Met Your Mother."

Spears and her former backup dancer Federline, 30, were divorced last summer after two years of marriage. The couple have two children, Sean Preston, 2-1/2, and James Jayden, 22 months.