Lindsay Lohan Attended Justin Bieber Concert Prior to Arrest

Actress was spotted with her sister, Ali, at the show at New York City's Madison Square Garden

Who knew Lindsay Lohan was a Justin Bieber fan?

Just before getting arrested early Thursday morning for allegedly punching a woman in the face at a New York City nightclub, the Liz & Dick star checked out the teen sensation's show at Madison Square Garden.

"She came in with the lights on and sat on the floor, and was attacked. She was smiling at everyone and took a few pics until escorted out," a concertgoer told E! News. "She came back with her sister, Ali. They sat in the front row. They left after an hour."

Of course, in hindsight, perhaps she should have stayed a little longer.

—Reporting by Ken Baker