Betelgeuse is the first star you think about when it is a star that is about to explode and when it does, it will put on a light show for the whole world to see (and we're saying that because people virtually nobody lives in Antarctica). Located on the right shoulder of Orion, you know. The one that hunts with the 2 dogs Canis Major and Canis Minor.
The very famous star is a red supergiant that was once a B-class star. It is expected to go to supernova real soon, before leaving behind a very powerful neutron star or a very weak black hole.