Carrie Fisher, or Princess Leia, as some of us know her, has battled with bipolar disorder (also known as manic depression) all her life.
Selena Gomez has been admitted to hospital in the Los Angeles area following a TV appearance with Jay Leno on Thursday.
Slapped Cheek is a viral infection caused by the parvovirus B19. It mostly affects children, although anyone can get it. It is sometimes also known as the fifth disease.