Betty White may be 93 years old, but she's still as high maintenance as ever (well, sort of). The actress, who recently joined Instagram [1], stopped by The Late Late Show With James Corden on Tuesday and made it known to the host that if she isn't happy, nobody will be. In a hidden-camera skit, Betty hilariously pranks James by calling him on the phone before her appearance and giving him a list of demands for her dressing room, including a change in lighting, a specific color the walls must be, and only wanting yellow M&M's. Watch the funny prank above to see James's reaction, then look back at Betty through the years [2].