Her name is Lunga... short for Nokulunga Buthelezi. She’s from South Africa. Lunga is a contortionist. The best I’ve ever seen. (And I’ve been to a few Cirque du Soleil shows.)
I present for your inspection two vidclips. The first is from Dutch TV. Lunga performs her routine from the European theatrical extravaganza “Afrika! Afrika!”
The second clip finds Lunga in the U.S.A., back when she was with the all-black UniverSoul Circus (which I’d never heard of before).
There is much more Lunga on YouTube. Just search for “Lunga” or “Nokulunga.” (Hat-tip: Happybutterfly.)