David ArquetteThe artist still known as Prince really doesn't like it when people take his picture.

He's a notorious control freak when it comes to his image and his team has instructed ushers at all of his 'Welcome 2 America' tour stops to vigilantly enforce the no-photo rule, even if people try to snap them on their cell phones.

And yet, aware of the irony, midway through his shows, Prince often encourages people to take out their cell phones anyway, wave them in the air in place of old school lighters, and even, yes, take some shots -- perhaps it's his way of admitting that resistance is futile.

And yet, resistance on the other end of it also proved futile for actor David Arquette recently at one of Prince's fabled 21 shows at the Forum in Los Angeles.