Bieber & Selena Gomez The Closed Mouth Kiss

5/10/2011 6:17 AM PDT

YEAH, it happened ... and it was caught on tape ... Justin Bieber and Selena Gomez KISSING each other ON THE MOUTH. Brace yourselves, Biebettes ... it's gonna be a rough day.

The young couple was caught bumping lips during a press conference in Indonesia a few weeks ago ... and somehow, the footage managed to stay under wraps UNTIL NOW!!!

Did you hear that??? That's the sound of a million teenage hearts shattering at the same time.