Lady Gaga Gives Fans a Birthday Performance to Remember (PHOTOS)
Lady Gaga had every reason in the world to celebrate on Monday night, as the pop phenom turned 25 years old and kicked it off with what was definitely the biggest birthday bash of her life.
Thousands of fans poured into the Staples Center in Los Angeles to see Mama Monster put on her infamously over-the-top stage show. There was blood, leather, piano solos ... pretty much everything Gaga fans have come to expect from her wild live shows.
Her fans even gave her a special birthday treat, as the entire Staples Center belted out "Happy Birthday" for Gaga.