The Biebs got his party on in Chicago.

Justin visited Underground Night Club last night and even hopped up on stage to show off his model walk in the Spring Style Series Fashion Show!

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Is it too late now to say sorry for not warning you about @JustinBieber? See him crashing our Style Series fashion show last night! #justinbieber #Bieber #purpose #loveyourself #belieber ?: @kohlmurdock

A photo posted by The Underground (@undergroundchi) on Apr 22, 2016 at 7:50am PDT

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When @justinbieber decides to model during our finale of #SpringStyleSeries! #justinbieber #bieber #purpose

A video posted by The Underground (@undergroundchi) on Apr 21, 2016 at 10:15pm PDT