Singer/songwriter Bruno Mars - the man behind pretty much every radio hit this past summer - was arrested early Sunday morning in Las Vegas on drug possession charges. Monday, the Las Vegas police department released a copy of the arrest document, which revealed Mars was taken in for felony possession of 2.6 grams of a “white powdery substance” that tested positive as cocaine. The 23-year-old, who had performed a concert earlier Saturday evening, has been ordered to return to court on November 18 for his arraignment.