The 'Beauty and a Beat' hitmaker drove his blue Ferrari with Moore in passenger seat and the couple headed for Bouchon restaurant, which is frequented by top stars such as Rihanna and David Beckham, in Beverly Hills, reported Ace Showbiz.
"All eyes were on Bieber and his girl - the two caused quite a stir when they walked into the restaurant," a source said.
Moore looked stunning at the lunch date. She wore a pair of black leather pants and low-cut black tank top. Her hair was styled loose. Bieber opted for a blue t-shirt, jeans and sneakers. He also wore a cap and sunglasses.
Twist. The 20-year-old model, who enjoys surfing and playing basketball, is a new face in the modeling world.