Beyonce Knowles guarded about new album

New York: Singer Beyonce Knowles is being very guarded about her next album and she is holed up in a studio here to work on it.

For her next album, Knowles is collaborating with Kanye West, as well as with her husband Jay-Z`s producer Hit-Boy. The singer is taking no chances for the album, and does not want her material being leaked, reports

"She`s spent thousands hiring out the whole studio. She`s got security on the doors to ensure no one hears a whisper. She`s being strict with proceedings too, putting in 14-hour days declaring nobody leaves until its perfect," said a source.