Happy Birthday, br Lady Gaga!.br Stefani Joanne Angelina Germanotta br turns 37 years old today.br Here are five fun facts br about the singer.br 1. Gaga is the only woman who had br five No. 1 albums in the 2010s.br 2. Her stage name br was inspired by br the Queen song, br “Radio Gaga.”.br 3. She wrote her hit br single, “Born This Way,” br in 10 minutes.br 4. Gaga signed a record deal with Interscope Records on her 20th birthday.br 5. Her favorite cartoon character br is Bugs Bunny.