A former personal assistant, friend and roommate of pop star Lady Gaga may be able to collect overtime pay for being on call "every hour of every day" for nearly a year, a federal judge has ruled.

Southern District Judge Paul Gardephe (See Profile) on Monday refused to grant the "Born This Way" singer and her company, Mermaid Touring Inc., summary judgment that the assistant, Jennifer O'Neill, is not entitled to payment for hours she spent on call, rather than actively working.