The Make-A-Wish Foundation has given a sick little girl an experience she'll never forget.  

Addy is just 5-years-old and she's been diagnosed with stage 4 cancer, and asked the foundation to be turned into a pop star like Katy Perry.

Addy wanted to star in a music video for "Roar," which is one of Katy Perry's hits.

The people at Make-A-Wish were able to make that happen and they released the video recently.  They also said the video helped Addy to stay strong and remain positive through her treatments.