These celebs want you to buy their apps: Lindsay Lohan, will.i.am and Justin Bieber

People are making absurd amounts of wealth by creating apps for smartphones, so it was only a matter of time before already-absurdly wealthy celebrities tried to get in on the action too.

Increasingly seeing apps as part of their personal brand portfolio, to sit alongside perfumes and calendars, celebs like Lindsay Lohan and will.i.an are creating apps as a way to tap into the social media boom and engage with fans, while convincing the world at large that they’re media savvy and willing to embrace new technology.

We’ve picked just some of the most notable celeb virtual entrepreneurs and their apps.