Blake Lively, Ryan Gosling Are Over

"Lock tight" witness saw Blake cheating.

Every pre-holiday, pre-premiere Hollywood romance you saw bud this fall is officially over. Word has broken that Ryan Gosling and Blake Lively -- clearly too perfect a pair to be the real deal -- are dunzo. Here's the scoop.

Celebitchy caught the report from Lainey Wednesday afternoon, and if you thought that blonde, blue-eyed Hollywood climbers Ryan Gosling and Blake Lively were the prime pair...well, finish ya glass and shield yer eyes from the lights because the party's ovah, people.

Read: Carey Mulligan "Stole" Blake Lively's Role

Word has it 23-year-old Blake Lively and Ryan Gosling, 30, had been sneaking around New York and L.A. together, and then at Christmastime, Blake hoofed it to Toronto to see Ryan and his fam. But on New Year's Eve, just four days after she was spotted in the Toronto airport, Blake was busted grinding on a new fella to ring in the new year. From Lainey:

"[...] We have a lock tight, unimpeachable eyewitness who saw, like right up close, Blake 'kissing and canoodling' a mystery dude that night."

Yes this was timed with the "Blue Valentine" publicity tour and no Ryan Gosling cannot keep up with Blake Lively and her clothes.

Read: Ryan Gosling on "Making Love" in Film

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Blake Lively and Ryan Gosling. Seriously.

Read: Ryan Gosling and Blake Lively: Celebrity Couple Watch