The "Diamonds" hitmaker was enjoying an evening out with friends at 1Oak nightclub in Los Angeles, when she came across the stray pooch in the nightspot's toilet, reported Female First.
The 27-year-old singer and her friends documented their find in a number of videos which they posted on the photo sharing application Snapchat, in which the raven-haired beauty expresses her disbelief at finding the puppy in the restroom.
"Well I found him in the bathroom somewhere and he ran up to me," in the video clip she says.
The pop star has dubbed her new furry friend Pepe and it remains unknown whether anyone who was present at the club has come forward to claim him.