Jessie J upset over album leak

British pop star Jessie J has been left disheartened after her new album leaked online days before its scheduled release.

The Domino hitmaker was due to unveil Alive next week (begs23Sep13), but the tracks have already surfaced on the Internet and the singer can't believe her new music has been leaked again.

In a series of Twitter.com posts, she laments, "One day. Just one day. Something I work hard on will NOT be leaked... Smh (shaking my head)

"The mystery in music is slowly disappearing. The big reveals don't happen anymore, everything is so immediate! Social networking just makes everything so accessible. Such a shame".

Jessie J was targeted by hackers earlier this year (13) when her demo version of Miley Cyrus' hit Party in the U.S.A. emerged online without her consent, while an unreleased song called Staying Thin, which she recorded early on in her career, previously leaked on the Internet too.