Justin Bieber has been calling a few friends to join him during his “Purpose World Tour.” The 5-month North American trek pulled into Atlanta’s Phillips Arena on Tuesday night (Apr. 12). The pop superstar called in another favor for his Beliebers, as Ludacris appeared on stage to perform his 2010 smash-hit with the Canadian singer, “Baby.”
Earlier this week, the 22-year-old was nominated for 12 Billboard Music Awards, trailing only The Weeknd who received 19 nods.

Photo via Mike Chester