Justin Bieber randomly did the sweetest thing for unsuspecting strangers at a pizzeria. According to Yahoo editor Kwala Mandel, he paid for the people sitting next to him!

Apparently, he even started a chain reaction within the store, encouraging other people to do random kind acts.

Later that afternoon, he tweeted his Beliebers to "give back" on Martin Luther King Day, so it seems like that interaction really had an effect on him.

Since the singer has surprised strangers with free lunch before, we're not too shocked that he randomly did something so nice. But sometimes it's easy to forget he's such a softie amidst the drama of his relationships and Twitter feuds.

Are you surprised that Justin did such a nice thing for unsuspecting strangers? What do you think about his gesture? Tell us in the comments!

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