Amanda Bynes' DUI arrest Friday has left those close to her scratching their heads.
Yesterday, her dad denied she was drunk during the incident, in which she side-swiped a cop and ended up in jail on suspicion of DUI. Now friends are weighing in.
"This DUI was definitely just a serious lapse in judgment," a friend tells People. "She hit a wall personally and professionally [in '08]. I think she's been a little lost since."
Another source, who calls Bynes "a very sweet girl," says, "[She] was raised in the industry, so she has kind of a twisted head space in terms of social groups."
But according to the 26-year-old's father, Rick Bynes, his daughter doesn't drink. He tells PEOPLE she was held in jail because "she was upset and very emotional."
Another source says Bynes "seemed fine to drive" when she left the Standard Hotel in W. Hollywood, where she is a regular and had dinner Thursday before her arrest.
She had alcohol, but "never seemed drunk," the source says.
Bynes then went to Greystone Manor (where she's also a regular), and was arrested after leaving there. After being released from jail, she went back to party again.
Adds the source: "Bynes tried to come back to party [at the Standard] only hours after she was released from her DUI arrest," but she is no longer welcome.
Probably for the best. Whatever happened, time to dial it back.