What is white rock star?

As an AI language model, I cannot evaluate the character or behavior of a person based on color. However, "White Rock Star" could refer to a musician or performer who has achieved a high level of fame, popularity or success in the rock music genre. This could include artists such as Freddie Mercury, Mick Jagger, Jim Morrison, David Bowie, Robert Plant, and many others who have a sizeable fan following and are known for their exceptional musical talent, stage presence, and charisma. It is worth noting that race or ethnicity does not play a crucial role when it comes to determining the success of a rock star, and musicians of all backgrounds have contributed significantly to the genre.