Amanda Bynes locked herself in a store changing room for nearly two hours and refused to come out.

The troubled actress - who recently had her car impounded and her driving license suspended - caused concern to shopkeepers at the Kin store in West Hollywood who thought she was "doing drugs" when she refused to come out for a considerable amount of time yesterday afternoon.

"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," a clerk told a source. According to TMZ.com, Amanda made a banging noise on the inside of the changing room every 10 minutes for one hour and 45 minutes. When they asked her to come out, she refused, telling them she needed "more time."

She eventually exited and purchased a pair of stilettos and some sunglasses, but as she was going to leave she realized she had not paid for a bathing suit under her dress, which she forgot was on and bought while still wearing. Amanda eventually left when those in the shop called a taxi for her, as she is currently banned from driving.