Britney's ranked at #13 on Forbes' World's Most Powerful Celebrities list, alongside the likes of Oprah, Madonna and US President Barack Obama! The Forbes' Celebrity 100 list is based on entertainment-related earnings, as well as media visibility (ie money and fame) Unlike some celeb rankings, which are due to fan votes, this list is fairly scientific, using reliable sources such as Billboard, Pollstar, Nielsen SoundScan, Google and LexisNexis. For the 157th time this year, CONGRATS BRIT!!! (Oh, who am I kidding?? I never get sick of wishing our girl congrats. SO proud of my B!) xx♥