It's so sad to read this article based on improper comparison. Britney Spears is the strongest pop star and you guys also forgot to mention how she made records without even doing crazy promotions that the other two artists did.
All the facts are wrong and seems like it's in favour of Gaga. Don't believe me?
Then why do they have Lady Gaga's concert video. Why not an iconic Britney Spears' performance from DWAD tour or VMAs.. why not Beyonce's Experience Tour? So lame.