Justin Bieber had quite an embarrassing moment this weekend at the airport after his pants fell down! During the singer's full body scan at the TSA security check, he put his hands up in the air and his pants fell to right above his knees. Luckily, he had a long shirt on so he didn't flash anyone.

The "All That Matters" singer is no stranger to the danger of saggy pants — he's had quite a few close calls already. Click through to see 10 instances where he nearly bared it all, then let us know in the comments below which photos make you gasp the loudest. Do you think he needs to invest in a belt?

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