A 7-year-old girl who inspired millions of people recently witnessed a magical transformation at her home.Volunteers with a nonprofit transformed the bedroom of Emma Mertens, who was diagnosed with a rare, inoperable tumor on her brain stem.The help came after Emma simply wanted one request: Letter and photos from people's dogs.When the group Special Spaces heard about her story, they worked to create a dog-themed bedroom with some special features.Tap the video above to find out how Emma responded to the changes.