Fresh back from a trip to the Bahamas, Charlie Sheen took a series of drug tests at his Los Angeles home on Saturday, with results of the urine portion reportedly coming back negative. The "Two and a Half" star was also administered a blood test and those results are expected on Monday. Sheen came back to Los Angeles on Friday after a brief vacation in the Bahamas and is reportedly spending time with his twin boys, as well as porn star Bree Olson and former nanny/rumored girlfriend Natalie Kenly.