DICAPRIO, REFAELI HEAT THINGS UP AT THE BANK NIGHTCLUB

Leonardo DiCaprio isn’t shy about letting people know he is back on with ex Bar Refaeli: They had a hot-and-heavy make-out session at new Las Vegas nightclub, The Bank, inside the Bellagio on New Year’s Eve.

DiCaprio and Refaeli arrived around 11:10 with actor Lukas Haas and 15 other pals. The group sat at a VIP table (stocked with $30,000 bottles of three liter Moet White Gold champagne!), overlooking the dance floor. Throughout the night, says an on-looker, the crew took countless pictures on their personal cameras. (At one point, DiCaprio even extended his arm and took a shot of him and Refaeli.)