Maria Menounos on the time Jack Nicholson got her booted from a Lakers game

During an appearance on his show Monday, Conan O'Brien asked Maria Menounos, a big-time Boston Celtics fan, to explain her "run-in" with Jack Nicholson, the 76-year-old actor who's been a constant courtside presence at Los Angeles Lakers games for many years.

The 35-year-old Extra host said she was sitting courtside at a recent Lakers-Celtics game with comedian Dane Cook during game 6 of the 2010 NBA Finals.

We made it our business, our like second job to go to all these games and really rally for our team," she said. "And all of a sudden -- we're courtside. I'm wearing my Celtics gear, I'm screaming, going crazy and I get booted! These guys come and pull us out of courtside! I'm like, 'What is going on?'

So we end up in the chairman's lounge at halftime and I'm like hiding in this hallway and all of a sudden Jack Nicholson comes out of the bathroom and he's like 'Heh, heh, heh ... I see they moved your seat.'

"He got me kicked out! I heard later he called [late Lakers owner] Jerry Buss and had me removed!