Amanda Bynes' strange behavior continues.

The former child star reportedly locked herself inside a boutique's dressing room for nearly two hours today (Monday). According to the clerks at L.A.'s Kin, Amanda took some clothes into the fitting room and then refused to get out. The clerks say they heard a "banging sound" coming from inside the room every few minutes. They tried to get her to come out, but Amanda kept telling them that she needed "more time."

When she finally got out, one hour and 45 minutes later, she went to the register and bought a pair of stilettos, sunglasses and a few other things. Then as she was walking out she realized she was still wearing a bathing suit top that she had tried on. She paid for the suit and asked the clerk to call her a cab. Amanda's car was impounded yesterday (Sunday) after she was caught driving with a suspended license.

Afterwards, one of the clerks said, "I was so worried about her. I didn't know what she was doing in [the dressing room]. I didn't know if she was overdosing, or doing drugs or what."