'Judy' hits high note for Renee Zellweger as Judy Garland

The appeal of "Judy" is as simple as its title -- watching Renee Zellweger inhabit the role of Judy Garland near the end of her life in boozy, jittery, soaring fashion. There are virtually no surprises in this dutiful biography, which could easily be a sort of gender-switch "A Star is Born," only with Garland portraying the aging superstar.

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