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His Eenie Meenie collaborator Kingston surprised him during the gig with pals Bow Wow and Soulja Boy, before Bieber also introduced Akon and Ludacris to the crowd.
In a series of posts on his Twitter.com page after the concert, Bieber writes, "That one was incredible. ATL (Atlanta) thank u. Everyone thank u. Tonight my dude Sean Kingston surprised me with Bow Wow and Soulja Boy.
"Then I had to kill em and bring out Akon and Ludacris - ATL we killed em tonight!! That is how u end a tour!! Felt incredible. So grateful and still can't believe it."
Bieber also showed off his Christmas spirit at the gig, urging audience members to donate gifts for sick children in a bus parked outside the venue.