04/13/2012 at 05:45 AM EDT
Pulling up in a black Range Rover, Justin Bieber
and a pal quickly breezed through Joe's Pizza in Hollywood for lunch on Tuesday.
"They were really friendly and chatty with the staff," an onlooker tells PEOPLE of the singer
and his pal, who ordered a couple slices of freshly baked Grandma Pie, a combo of marinara, fresh mozzarella and fresh basil topped with extra virgin olive oil.
"It was a quick in and out," the source says. "They grabbed their pizza to go." – Jessica Wedemeyer