Janet Jackson Taking Sex Films

 Sources tell TMZ Janet Jackson was so "blown away" by the positive reaction to her appearance on the "American Idol" finale that she's "seriously entertaining" a concert tour ... that could begin before the end of the year.

Janet was amazing on Wednesday's "Idol" -- performing "Again," "Nothing," and "Nasty."  We're told as of today a concert tour is now on the front burner.

Miss Jackson -- who has only toured once since 2002 (and a bulk of that tour was canceled) agreed yesterday to appear at the Essence Music Festival in New Orleans on July 2.

Janet wore a skin-tight catsuit that showed off some serious curves as she bumped her 1986 hit single. It was a highlight on a night packed with highlights that included performances from Christina Aguilera, Hall & Oates, and Bret Michaels, who scheduled his Idol appearance without consulting his doctors.

Janet Jackson has been spotted a few times now with her new 'do, most notably at a red carpet premiere for the new movie Why Did I Get Married, Too?. Learn more about her new hair style here.

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