Britney Spears has been dealt a new blow as she hopes for a pop comeback - her new material won't see the light of day until 2008. The pop superstar was hoping to release a new album later this year (07), but her publicist has confirmed all album plans have been shelved. Spears' representative, Leslie Sloane Zelnik, tells America's Life + Style magazine, "I put her on hiatus. Brit's album is pushed until '08." But a source close to Spears' camp insists executives at her record label, Jive, fear the Toxic singer's pop career is over, judging by her latest efforts. The insider tells the publication, "I'm surprised the album wasn't pushed back to 2009. Everything's up in the air with the album right now."