The 30-year-old "Poker Face" hitmaker visited Casa Hogar home for boys in Cabo San Lucas over the weekend, where one little boy, Christian, asked her to perform, reported Female First.
Gaga sang without any instrument. She posted a video of her performance online.
"Casa Hogar Cabo AC Facebook Group. Donate to these wonderful boys and help build a home for their sisters they were separated from home Reunite brothers with their sisters, Casa Hogar - which is home to 31 boys between the ages of four and 18 - aims to 'offer a special and happy boys home set in a camp like environment providing physical and emotional care'," she wrote.