Mine, All Mine!Think you should have complete control over your company? Think again.

Los Angeles hairstylistBilly Lowehas a well-known clientele, including Ellen DeGeneres and the cast ofDesperate Housewives. When he's not working at his private Beverly Hills hair studio, he might be on his way to style hair on a talk show set or for a Hollywood charity event. His first hair-care product will hit the market later this year.

As in control as he appears, Lowe, 35, knows he can't control everything that happens to his 2-year-old company. Hollywood can be a notoriously fickle and demanding place, and market timing is largely a matter of luck. A few cancellations can throw off a day's sales projections and leave Lowe pulling out his hair. "Sometimes it catches you off guard," he says. "It's amazing some of the things that are out of [a leader's] control."