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Whitney Houston may not be performing at the Grammys tomorrow evening, but she's going to be belting it out tonight at the Clive Davis/NARAS bash at the Beverly Hilton, and sources close to the legendary singer say she's never been in better shape.

We snapped her leaving a medical building in Beverly Hills on Friday afternoon, and given how radiant she looks, we'd have to agree! It's good to see the once troubled starlet looking so happy and healthy -- our only wish is that she was performing at the actual ceremony!