Michael Lohan isn't thrilled his daughter has signed on to star in Manson Girls. (She will play one of the murderer's cult followers.)

"I really hope that Lindsay gets back to the kinds of films that led to her success," he told Us Weekly Thursday at the Celebrity Apprentice finale in NYC. "I'd like to see her do more mainstream films."

Lohan's past string of films — including I Know Who Killed Me and Bobby — have bombed at the box office. Chapter 27 — her latest movie opening this weekend — centers on the assassination of John Lennon.

Michael told Us those films "were geared to a specific audience."

"When you're the kind of star Lindsay is, you have to appeal to a general audience, not just a specific audience," he added.

Michael also told Us Weekly he was relieved those Callum Best sex tape rumors were put to rest.

"You don't know what people put out there anymore!" he said. "So many people have hidden cameras. Our private lives are our private lives — people don't respect that."