Heartbroken woman surprised with new pug puppy in heartwarming viral video

Last spring, YouTube user 30poundman surprised his girlfriend with a new puppy.

The little pug was intended to help ease her broken heart: her 10-year-old beagle, B.B., had been put down earlier in the day due to a heart tumour.

The video of 30poundman's girlfriend's priceless reaction has just now gone viral, with dog lovers everywhere swooning over the cute pup and his new owner's instant love for him.

"If there was a Geiger counter for adorable, it would be flying off the charts right about now!" wrote a CBS blogger.

"I am sitting here at work with tears in my eyes," one YouTube viewer commented. "What a sweet and wonderful thing to do."

"You never forget a friend lost, but taking care of a new one makes the sorrow a bit easier to bear. Thank you for sharing this moment with us," wrote another.