Billboard Music Awards red carpet into their own date night.The couple posed for photos on Sunday night ahead of the award show — which the boy-bander is hosting — and looked adorably in love.The “Jealous” crooner, 28, wore Fendi for the big night while the actress, 38, sported a Dolce & Gabbana gown.Chopra was not expected to attend the ceremony until Jonas cracked his rib in a bike accident.