Pink Saves Puppy

Sources tell TMZ ... P!nk was surfing the Internet recently, when she stumbled upon a story about a puppy that had been thrown off an L.A. overpass ... and suffered 3 broken legs when it landed in the L.A. river.

We're told the dog was in bad shape ... and required major surgery FAST ... or else. That's when Pink sprung into action -- contacting the Ace of Hearts animal rescue organization and offering to pay for any medical expense it took to save the dog's life.

$5,000 later ... the dog went under the knife -- and recovered!!