Justin Bieber Enlists Hilary Duff & More Stars for Single Promo

Justin Bieber takes a bite out of his sandwich while making his way back to the Montage Beverly Hills Hotel with a bodyguard on Saturday afternoon (August 15) in Beverly Hills, Calif.

The 21-year-old “Where Are U Now” entertainer has been promoting his upcoming single “What Do You Mean?” by enlisting his famous pals to create signs on Instagram.

“Thanks @hilaryduff. #12Days #whatdoyoumean?” he captioned one with Hilary Duff, which you can see below.

Justin also got Austin Mahone, Christina Perri, Tony Hawk, Alanis Morissette, and others to help out too!

25+ pictures inside of Justin Bieber out and about in Beverly Hills…