I doubt it. It would not be that Justin Bieber harbors any sort of animosity towards Arabs and does not want them to have fun; rather, it does not seem to be the thing he would spend time caring about.
Answer They are not the same. Islam followers are called Muslims. Islam is a religion and faith. Arabs are belonging to a race or nationality. Not all Muslims are Arabs (<25% of Muslims are Arabs) and not all Arabs are Muslims (around 90% of Arabs are Muslims).
Yeah there are so-called 'black' Arabs. Well they are just Arabs who are darker-skinned, especially in Oman,Yemen, and Saudi Arabia. Also many Afro-Arabs who were the mixture between Africans and Arabs over the years.