RUTHLESS REBA PARTIN' WAYS WITH DOLLY!

Her push to snag country crown puts her at odds with old-time pal

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SPITFIRE Reba McEntire wants to reignite her sitcom career and crown herself the queen of country music — but the Fancy singer’s red-hot ambition may torch her four-decade friendship with Dolly Parton, insiders dish.

“There’s always been a friendly rivalry there, only now Reba’s pressing Dolly’s buttons big-time,” spills an insider.

“Reba’s always trying to one-up Dolly in everything she does.”