How old do you have to be go backstage at a concert?

The minimum age to go backstage at a concert varies depending on the artist and the venue. Some artists have a strict policy that no one under the age of 18 is allowed backstage, while others may allow younger fans with a parent or guardian. Some venues also have their restrictions, such as requiring all backstage guests to be at least 21 years old. It is always best to check with the artist's management or the venue in advance to find out their specific policy.