What is the definition of talent?
Fruit is often inspected and there are quality guidelines. Fruit that is over ripe or bruised may still fall well within acceptable quality, if that fruit is to be cooked and made into jam.
Can Justin Bieber hold a tune? Yes. Does he sing songs which appeal to a mass market (of pre-teen females)? Yes. Does he have what it takes to have a long and prosperous career? Only time will tell.
And it would not surprise me in the slightest if in 5 years from now we've forgotten who Justin Bieber is.