"Born This Way" singer Lady Gaga has celebrated her 26th birthday.
Born Stefani Joanne Angelina Germanotta in New York, Lady Gaga said she has been influenced by Madonna, Judy Garland, Britney Spears and Michael Jackson.
The singer shot to fame with the release of her debut studio album, The Fame, in 2008. It sold over 15 million copies worldwide and gained her six Grammy nominations.
Well known for her outlandish dress sense and out-there stage shows, she has wom a huge fanbase all over the world.
She became the first Twitter user to have 20 million followers and was listed by Forbes as one of the World's Most Powerful Celebrities and is seventh in its list of the "100 Most Powerful Women".
Take a glimpse of the Mother Monster...