Bieber & Selena Gomez The Closed Mouth Kiss

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.

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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.

Bieber BUYS OUT Flower Shop for Selena Gomez

Justin Bieber scored major points with his GF Selena Gomez last week -- when the 16-year-old phoned in a GARGANTUAN flower order ... and it wasn't even Valentine's Day!!!!

Sources close to Bieber tell us Justin called up a local florist on Wednesday hoping to "fill Selena's house with flowers" ... just because he felt like it.

We're told the florist needed EVERY SINGLE FLOWER in the shop to complete the order ... and had to use "multiple trucks" to pull off the love stunt.

One source close to the couple tells us Selena LOVED the surprise.

Selena Gomez Death Threats Over Bieber Kissy Pics

Selena Gomez may have put her life on the line during her romantic Caribbean vacay with Justin Bieber -- because ever since pics surfaced of the kissy couple ... she's been getting death threats.

The lethal photos came out today -- showing Selena and the Biebs in St. Lucia ... kissing -- and scores of teen girls across the planet are bloodthirsty with envy ... taking to Twitter to express their rage writing:

-- roses are red, violets are blue, @selenagomez if you'll break @justinbieber's heart I'm gonna kill you :3
-- @selenagomez I'll kill you I swear on GOD!!!!
-- @selenagomez If you are the Girlfriend of Justin I will Kill you I HATE YOU :@ !!!
-- @selenagomez whore cancer whore..like i'mm kill myself cuz i saw you and Justin kissing well thankyou Selena thankyou now i'm killing myself
-- @selenagomez stay away from Justin pedophile, retard wait i'm gonna kill ya in the night underneath your smelly bed

Calls to Selena's reps have not been returned.

More Justin & Selena

Bieber & Selena Gomez The Pancake Date

Here's a breakfast combo for ya -- Justin Bieber and Selena Gomez leaving the International House of Pancakes yesterday ... ARM-IN-FRICKIN-ARM!!!

The two international pop stars sat down for breakfast yesterday in Philadelphia .... hours before they were scheduled to perform at the Q102 Jingle Ball.

According to the good folks at IHOP ... Biebs, 16, and Gomez, 18, HELD HANDS inside the restaurant ... and looked "cuddly" while sitting on the same side of a booth.

Nothing says "romance" like a Rooty Tooty Fresh and Fruity.