Audrey Nethery is a dancing machine.

When we saw her last, she was taking the Zumba world by storm . Now, she's charming the pants off America's pop sweetheart, Selena Gomez.

Audrey is 7 years old and has a rare bone marrow disease called Diamond-Blackfan anemia. The disease is characterized by a "failure of the bone marrow to produce red blood cells ."

The "Love You Like A Love Song" singer met the little dancing warrior at a meet and greet. They wasted no time and had a pretty great dance sesh.