Exempt or nonexempt, who's entitled to overtime pay?

Lady Gaga , whose legal name is Stefani Germanotta, made a media splash from a lawsuit brought on by her former personal assistant, Jennifer O'Neill, who alleged that the pop star owes her overtime for her round-the-clock work from early 2009 until March 2011.

http://www.foxreno.com/news/news/national/exempt-or-nonexempt-whos-entitled-overtime-pay/nWSbq/