David Letterman might have something to say about "Canadian High Schools," but Justin Bieber, 18, can enjoy the last laugh, having officially graduated from St. Michael Catholic Secondary School in Stratford, Ontario, after passing his final exams two months ago.

Bieber's graduation ceremony was held on Thursday night, but he wasn't present for the celebration, reports USA Today. "I guess if it happened quietly it's because Justin chose to keep aspects of his education quiet," said Dan Parr, a superintendent for the district school board.

There were 193 graduating students in Bieber's class. His class ranking is not being disclosed by the school.

Bieber will next perform at the Teen Choice 2012 Awards, airing July 22 at 8 p.m. on Fox.

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