Lady Gaga has always been known for her flamboyant costumes and live shows that keep her fans mesmerized. She used to write songs for other pop artists like Fergie, the Pussycat Dolls, and Britney Spears. Her first single, Just Dance, became popular in clubs throughout the United States and Europe and was number one on the Billboard Pop Songs chart. Now Lady Gaga is most well-known for defending gay rights and being one of the most outstanding speakers on this topic.