Nick Jonas, you dirty dog!  The 18-year-old was spotted over the weekend at a movie theater in Los Angeles with 26-year-old Australian singer Delta Goodrem.  The paparazzi even got shots the two holding hands as they left!  Check out a picture of Delta after the jump. (Source)

According to Celebuzz, the couple have a lot in common, despite the age difference:

Don’t worry JoBro fans, Delta is as squeaky clean as her rumored new beau. After surviving a battle with Hodgkin’s lymphoma in 2003, Delta has committed herself to living a sober and clean lifestyle. Delta is also very involved in charity work, particularly causes that help children suffering from leukemia.