They performed "U Got It Bad," a song that Bieber often covered during the Believe Tour.
Akon also made an appearance onstage:
You know what also happened in Atlanta last night? Justin and tour opener Post Malone seemed to squash whatever drama was going on between them when Malone was photographed grabbing Bieber by the neck last weekend. They beautifully parodied the scandalous pic on the Biebs' Instagram: