But it could be for the sweetest reason!
"It definitely makes a big impact because painting a head is pretty unique and striking," says film and television makeup artist Georgina Ryland.
Can Prince Harry stave off hair loss with an omega-3 supplement made from caviar?
When it comes to fancy fêtes like the Met Gala, is bald the new updo? Model and actress Cara Delevingne may agree, as she rocked a silver-painted shaved head to accentuate her disco fever getup.
25-year-old model Dayna Christison is also in cancer treatment. Since then, she has gone through chemotherapy treatment and two stem cell transplants.