"20 Feet from Stardom" is a movie about singers who are very, very good at singing. These singers are often called backup singers because they sing behind the famous singers that people hear on the radio and see on TV.
Even though they are really good at singing, most people don't know their names or recognize their faces. They are often just the people in the background who make the famous singers sound even better.
The movie is about how important these singers are and how hard they work. It's also about how sometimes, even if you are really good at something, you might not get all the recognition you deserve. In this case, the backup singers are "20 feet from stardom" because they are so close to fame and success but not quite there yet.
The movie talks about how some backup singers, like Darlene Love and Merry Clayton, did eventually become famous because they worked really hard and had some lucky breaks. But the movie also shows that even though they became famous, they still had to work really hard to keep their success and not everyone is able to make it to that level.
Overall, the movie is about how important it is to appreciate everyone who works hard to make something great, even if they are not the ones who get all the attention.