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Justin Bieber has to be the luckiest 18-year-old on the planet!

The Boyfriend singer, who snapped a shirtless pic backstage at the 2012 Victoria's Secret Fashion Show in NYC, hit the catwalk alongside sexy VS angels ... who were wearing next to nothing.

After his performance, Biebs enjoyed a blonde sandwich backstage. Jealous.

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The Victoria's Secret Fashion Show will air on December 4th.