NEW YORK — It's practically become a rite of passage for teen pop stars — if あなた want to クロス over to the big screen, it might help to channel a little Joan Jett. That's what Britney Spears did in "Crossroads," when she sang along to "I 愛 Rock 'N Roll," and now JoJo follows suit, in her upcoming film debut, "R.V."

"I made a conscious decision not to play a singer in a movie, so I'm definitely not [singing for real]," she said. "But in one of the scenes, I have to put on an iPod and just sing very off-key to a song I had no idea existed before, a song によって Joan Jett. It's so out of character...