She then offered advice to stars eager to stay out of the headlines, including always wearing underwear and snubbing reality shows.
She said, "You may not have seen me in a while because when I'm not promoting something I try to stay out of the tabloids. I'm not perfect but I've found there are a few simple ways for a young celebrity to keep a low profile. Like for starters, wear underwear. I mean, why wouldn't you? It takes seconds to put on and it's comfortable. Underwear, it's your friend."
And Johansson had the studio audience rolling in laughter when she was joined by Kristen Wiig as Lindsay Lohan's mother Dina and Abby Elliott as pop star Ke$ha for a rendition of Class from the musical Chicago.