Madonna’s been given almost total power when it comes to her upcoming biopic, but an insider says her diva demands and see-saw decision-making could spell disaster. The Queen of Pop, 63, has been auditioning a slew of actresses to play her — Euphoria’s Alexa Demie and Ozark star Julia Garner are said to be at the top of the short list — “and she’s been putting them through the wringer,” the insider dishes. “They’ve got to read, sing and dance for her and even do a choreography boot camp.” As for penning the screenplay, “after the deadline flew by, Madonna hired a new writer and then reconceive…
