Sabrina MAKING HER OWN RULES

After more than a decade in the biz, Sabrina Carpenter isn't afraid to speak her mind!

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Sabrina Carpenter has developed a reputation as a playful flirt with a cheeky sense of humor and an easygoing demeanor. She doesn't like to be pushed around, though. While taking a hydration break during her March 14 Short n' Sweet tour stop in Manchester, England, chants of "chug, chug, chug!" began and turned to boos when she failed to drink every last drop. Opening her mouth in shock, Sabrina picked her bottle up, polished off its contents and raised her middle finger before delivering a stern warning behind an angelic smile: "Never boo me again!" she scolded the cheering crowd.

Her Girl Squad Taylor's been like an "older sister," Sabrina told Who What Wear. Jenna Ortega, 22, Chappell Roan, 27, and Joey King, 25, are also among her famous confidants. "Sabrina's had a ton of support from other women in the industry and wants to pay that forward," says a source. "She feels like there's room for everyone."

Sabrina isn't afraid to speak her mind - whether it's reprimanding concert audiences, opening up in interviews about her mental health struggles or penning songs about public feuds. "For a long time, Sabrina tried to please everyone she was a Disney kid, so there were a lot of restrictions and expectations, people telling her how she should act," notes a source. "But she makes her own rules now."