Fickle finger of fate Randy Jackson doesn’t mince any words when it comes to former “American Idol” contestants whose al bums have tanked following their initial success on the show. “Once you graduate high school you can’t blame the high school,” Jackson tells AOL Television. “The truth really is [that] it’s up to them to make amazing records. If they don’t make amazing records . . . you know, the business kinda catches up with them.”

Jackson doesn’t name any names, but Taylor Hicks, Ruben Studdard and Katha rine McPhee have recently been dropped by their record labels – while the debut album from last season’s win ner, Jordin Sparks, opened to the lowest sales ever from an “Idol” champ.

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Last, but not least: * CUNY TV’s “Theater Talk,” co- hosted by The Post’s Michael Riedel, is ex panding to public TV stations throughout the Northeast.

* Cate Edwards, daughter of Democratic presidential candidate John Edwards, visits today’s “Montel” (10 a.m./ Ch. 5).

* “The View’s” Joy Behar continues her “Bitchin’ With Behar” standup act at The Zipper Theater (W. 37th) Feb. 14, 28 and March 13, 27.