Bynes got the boot Thursday because she allegedly smoked marijuana in her room repeatedly after she was told not to, then was so insulting to a front desk clerk, she made her cry, the celebrity news website said.
Bynes reportedly told the young woman she was "too ugly" to check her in as a guest, then offered to introduce the clerk to a plastic surgeon, TMZ said.
Bynes insisted to the website she left the hotel of her own accord.
The 27-year-old starlet is known for her work on "The Amanda Show," as well as in the films "Hairspray" and "What a Girl Wants," but her last major screen credit was a supporting role in 2010's "Easy A."
Her once-bright career has been eclipsed in recent years by her bizarre Twitter rants and media reports of her erratic behavior and brushes with the law.