Austin Mahone Helps Promote Justin Bieber's New Single 'What Do You Mean?'

Justin Bieber eats on the run while heading to the Montage Beverly Hills Hotel with his security team in tow on Saturday afternoon (August 15) in Beverly Hills, Calif.

The 21-year-old singer has been super busy promoting his new single “What Do You Mean?” by asking his celebrity pals to create signs on Instagram.

“Thanks @austinmahone 13 days,” he captioned one with Austin Mahone, which you can see below.

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

25+ pics inside of Justin Bieber eating and walking at the same time…