Ashley Olsen was out and about in NYC today with wet hair, a BlackBerry in her hand, and a collection of books and magazines in her arms. The designer, who recently split from Justin Bartha, was by herself, but her sister, Mary-Kate, hit the town last night with a male companion by her side. The sisters may have gone their separate ways this afternoon, but they have been spending lots of quality time together in the Big Apple for both work and play in recent weeks. The pair partied and rocked their individual style at the Met Gala last Monday and also toasted the Tribeca Film Festival before its launch. On the business side, they have their fast-growing fashion empire to focus on. The duo were named "America's Next Billionaires" in Newsweek's last issue, soon after the headlines that The Row now generates an estimated $12 million per year. The high-end collection is just one of several stylish business ventures the Olsens are pursuing. Not only do they own more affordable clothing lines, including Textile Elizabeth and James, but they also recently announced their plans to launch a shopping site called StyleMint.