4. ROBERT DOWNEY JR.
When you do not take care of your own needs, you can be hurt by popularity. Robert Downey Jr. had to learn this lesson the hard way. The actor became addicted to drugs and alcohol after the success of the 1993 film Chaplin. This led to several arrests. His career was thrown into a tailspin when he was fired from the Ally McBeal series. He spent years on these issues and clearly succeeded, as shown by his post-rehab project. He not only landed a Sherlock role but also became Iron Man, the most iconic character of the MCU.
