Lady Gaga named the world's Most Powerful Celebrity with Bieber, U2 and Elton John in top 5

Lady Gaga has officially been named as the world's Most Powerful Celebrity.In Forbes magazine's annual Celebrity Power 100 list, the 'Born This Way' hitmaker has beaten the likes of chat show host Oprah Winfrey ' who has held the top spot for the past four years ' teen singing sensation Justin Bieber and Sir Elton John to top the poll.In addition to the $90 million earnings she has accrued