Insiders says bumbling Scrubs star Zach Braff has let the popularity of his hit show go straight to his head, according to Star magazine. “Zach used to be the most humble, unassuming guy,” a source close to him explains.

But when "Scrubs" got more popular, Zach, 31, reportedly got a hefty raise (to $350,000 per episode) and dated a few Hollywood stars- so his “ego has gotten really bloated,” the source says.

“It’s most obvious in his approach to women. He now waltzes into the hip nightclubs and immediately sets his sights on the most beautiful women. Zach is a great guy underneath the bluster, but he’s no Brad Pitt!" the source added.

-Photos of Zach