Major updates about Britney Spears' recent legal troubles! As Perezcious readers know, the 44-year-old singer was arrested on suspicion of DUI earlier this month after police caught her swerving between lanes and speeding. Cops allegedly found an "unknown substance" in her car at the time of the arrest, which sources say is possibly Adderall. Whether it's pure Adderall is unknown, but the pills reportedly were tested to see if they were mixed with other substances, like fentanyl, cocaine, or meth.