The star is currently in South America as part of her 'Born This Way Ball' world tour, and used her time in Rio to visit a favela in Cantagalo.
Lady Gaga was mobbed by fans during the visit to a social project that is underway in the area.
The singer has been in South America for the last week and has spoken passionately about how much she has enjoyed being in the country – particularly her time in Rio.
"I'll never forget Rio, you lit my heart into flames," she wrote on Twitter, before adding: "We even played football, they were SO GOOD IT WAS CRAZY."
Lady Gaga posted a picture of herself playing football with the children on her Little Monsters website: As well as playing football, Lady Gaga spent time speaking to children in the area and was photographed sitting on the back of one child's motorbike.
Lady Gaga's 'Born This Way Ball' tour is due to continue in Sao Paulo on 11th November.