As Justin Bieber might say: "Sorry." He's canceled remaining tour dates but it's not clear why.

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 Justin Bieber parties in Atlanta

Video captured Justin Bieber  dancing at Atlanta nightclub

His Facebook page posted this cryptic statement:

"Due to unforeseen circumstances, Justin Bieber will cancel the remainder of the Purpose World Tour concerts. Justin loves his fans and hates to disappoint them. He thanks his fans for the incredible experience of the Purpose World Tour over last 18 months. He is grateful and honored to have shared that experience with his cast and crew for over 150 successful shows across 6 continents during this run. However, after careful consideration he has decided he will not be performing any further dates. Tickets will be refunded at point of purchase."

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It's not the first time he's exhibited fatigue. Last year, just before two concerts in Atlanta, he posed a message on social media saying he is done meeting and greeting with fans.

This time, TMZ quotes a source saying he's just kinda over it.

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