FEARS FOR AUDREY FAN ARIANA

Offers sly olive branch to ex-rival on the rise

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AUDREY superfan HEPBURN Ariana Grande is obsessively trying to copy her idol's look including emulating her pin-thin frame-but people around her think she's taken it too far and are convinced she may be starving herself to death, sources tell GLOBE! "Ariana has always been petite, but she's lost a lot of weight recently," spills a spy.