Her subsequent albums became also hits and she became a very popular figure, with her face covering billboards all over the megacity of Istanbul. She released seven more albums after 2001, each time accomplishing average sales as the internet age made it harder to exercise copyright claims. Professional singers have typically had a lot of training, are highly talented, and have an excellent ear for identifying tone and pitch. They also possess a certain level of natural singing ability including a wide vocal range or pleasant vocal resonation. Singers often freelance and are contracted on a per job basis, either as a singer or as a consultant or judge in singing competitions.