The 'Voice' judge cut off all her long hair to raise more than 500,000 pounds for a charity based organisation Comic Relief, reported Daily Star.
"Shaving my head was a massive highlight. I've been wanting to do it for a long time but I wanted to be famous enough that it would raise a lot of money," the 25-year-old 'Price Tag' hitmaker said.
Jessie J chose to go bald in March.