Will Smith has defended Justin Bieber and says he is just acting like a normal teenager.While the 19-year-old singer has recently received criticism for arriving on stage two hours late for the first of his London shows and threatening a photographer, Will insists he is simply being a normal teenager.He told 'Extra': "When somebody is 19 years old, they're gonna do what they're gonna do, just like we did."Will - whose son Jaden, 14, is close friends with Justin - also revealed he has offered Justin advice and is available whenever he needs someone to talk to.He added: "For me, the most important thing was for him to know anytime he can just call and I'll come, whatever happens. At that age, that's what you need, to know you can do what you're gonna do, but you have somewhere you can go, where you can find safety."Smith added, "It's hugely important to support artists, young artists specifically. There is a war against that kind of artistry, that kind of creation."Will isn't the only star to defend Justin, One Direction's Louis Tomlinson believes the singer has been unfairly treated by the media recently and wishes they would "take it easy" on him despite admitting he is not close to the 'Beauty And A Beat' singer.The 21-year-old singer tweeted: "Although I don't know him personally, I do wish the press would take it easy on @justinbieber."He then added: "I really do empathize with him, I don't see anything out of character in comparison to any other teenagers I know (sic)."