Halloween couldn’t have come at a better time for on-again Hollywood couple Robert Pattinson and Kristen Stewart. The reunited pair attended the Patron XO Cafe and Maroon 5 holiday party in Los Angeles, where they could hide behind plastic masks. A spy told us, “They came wearing masks and stuck close through the night. They were having fun, laughing, flirting, holding hands. They spent most of the time in the VIP room with Adam Levine and Katy Perry.”