Who knew the little Mouseketeer girls, Christina Aguilera and Britney Spears would grow up to be big pop stars?  Both have (or had) successful careers, hit songs, raunchy videos, sold-out concerts, tons of fans, and now, they have both added 'mom' to their list of accomplishments and both are embarking on hitting the limelight again with new music, and new looks.  It was believed that the two didn't get along - that they had some sort of rivalry, always trying to outdo the other, but that's not true according to Xtina.... More here