Star Magazine snitches tattle that Britney Spears and her estranged mother Lynne had a “shocking slapfest” in mid-June that “left Lynne shaken and Britney more determined than ever to cut her mother out of her life for good.”

It all started when Lynne showed up at Brit’s house over the June 15th weekend: “Lynne barged into the house and insisted on taking the kids out to spend some private time with them,” an insider told the tab. “She didn’t ask or suggest, she demanded!” says the insider. “Then she began denigrating Britney’s mothering skills and losing her temper at the same time!”

“Despite their problems, Lynne cares deeply for Britney and wants to find a way to help her,” a “friend” told Star. “She thinks antidepressant drugs may be the answer. Lynne feels Britney has severe depression issues, and they are in large part the cause of her apparent manic behavior and past problems with alcohol.”