Stefanie studied classical piano beginning when she was just 4 years old. By the time she reached high school, she was writing her own songs and eventually started performing in local night clubs. Only a few years later, she said goodbye to Stefanie and Lady Gaga was born.
These days, Lady Gaga says she prefers to be addressed as just Gaga. "It feels weird when people call me Lady," she says. "It's so formal."