Over a year after igniting romance speculation , Mariah Carey and Anderson .Paak once again stepped out together for a PDA-filled outing. In photos obtained by Page Six, the pair was spotted holding hands while arriving at Westfield Century City in Los Angeles for a screening of “The Devil Wears Prada 2” Thursday evening. The “Fantasy” songstress, 57, donned a chic LBD for the date night paired with black platform heels and a matching blazer. She swept her locks to the side and accessorized with a black handbag, lariat-style belt and a glittering necklace. Mariah Carey and Anderson .Paak were spotted on a PDA-packed date night Thursday evening, as pictured above. BACKGRID The two stars were seen in video holding hands as they stepped out to attend a screening of “The Devil Wears Prada 2” at Century City mall in Los Angeles. BACKGRID Anderson, 40, wore a black suit adorned with sparkling pinstripes, amping up the look with an open collar, a pair of round sunglasses and a necklace.…