Influenced by David Bowie, Michael Jackson, Madonna, and Queen, Lady Gaga is recognized for her flamboyant, diverse and outré contributions to the music industry through her fashion, performances and music videos. As of October 2011, she had sold an estimated 23 million albums and 64 million singles worldwide and her singles are some of the best-selling worldwide.[4] Her achievements include five Grammy Awards and 13 MTV Video Music Awards. Lady Gaga has consecutively appeared on Billboard magazine's Artists of the Year (scoring the definitive title in 2010), ranked fourth in VH1's list of 100 Greatest Women in Music, is the fourth best selling digital singles artist in US according to RIAA,[5] is regularly placed on lists composed by Forbes magazine, including The World's 100 Most Powerful Women from 2010 to 2013,[6] and was named one of the most influential people in the world by Time magazine.[7][8] Besides her musical career, she involves herself with humanitarian causes and LGBT activism.