. >> reporter: wesley schultz, lead singer of the leem nears, says heain intruptz a concert in the midstthe fans' most popular song. >> it's usually stopped between "ho, hey." >> would you mind putting away all your cell phones. phones. >> reporter: broadway stars are also fighting back. the creator of the smash hit "hamilton," lin manuel miranda, recently tweeted, "you don't pick up a phone when you're caught in a moment. you stay in the moment." in 2009, broadway legend patti lupone halted her big number in "gypsy," when she saw a camera. ( applause ) >> it's enraging. >> reporter: lupone is still fighting the cell phone craze. do you think it's a battle you can win? >> well, i'll die trying. i will give up the stage before i give up allowing phones in that theater. >> reporter: last year at lincoln center, lupone reenacted how she snatched a phone from a texting audience member. >> it was right here. it was this lady right here, and i just grabbed the phone. it has to do with concentration, respect, focus, and why are you there. >> reporter: but more and more fans feel like they haven