Aguilera vs. Spears: the new challenge (of sales)

In this period, the temptation to make yet again Christina Aguilera and Britney Spears in the competition is strong.
Obviously not determine who has the most dyed blonde or to reward those between the two can talk to more gossip spicciolo: what we want to do is to compare the two icons of pop-contemporary in terms of their return music scene and so try to analyze their new single (very similar) “Keeps gettin ‘better” and “Womanizer” making assumptions on which forecast song will have more success with a good poll
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“Keeps gettin ‘better,” the first single extract from the Greatest Hits Out November 7, is an example of how a great singer Christina Aguilera is what sells shamelessly to the “commercial” aside style and creative original music that has so far accompanied his career (except for the first album).
Obviously to make the cost is also his wonderful voice that was put into the background to make room for a type of song ( “Keep gettin ‘better”, precisely) by a few vocal demands. It certainly has the ability to admire Christina to continually evolve and experiment with different things in order not to be crystallized in a single musical style, but this turning pop / glam elektro little convincing, though for now the new single seems to have a lot achieving success, for example, a single day in the top 3 most downloaded songs in USA.
Tags: Poll, Pop, sales record