Instagram isn't without commercial possibilities. It has a growing and involved user base, and the app is also catching on with companies. The Ann Taylor clothing chain, Urban Outfitters Inc. and fashion label Marc Jacobs, for instance, have created accounts and use Instagram to promote their brands. The app is also popular with celebrities and politicians who have created accounts, including singer Justin Bieber, President Barack Obama, professional skateboarder Tony Hawk and rapper Snoop Dogg.