Actually, that information is not accurate. Most Madonna fans hated/hate Britney because of all the comparisons with her and they felt she was "untalented" and a "copy cat". Britney never had any kind of "lack of impact" problems.
Oh, and Britney had a 5, not 3 (shame on you, slw84), year old extremely successful career in 2003 AND was doing miles better than Madonna, who was going through one of the worst moments in her career - which was also another problem for the Madge stans.
These Disney girls ALL lack real spark and impact in the music industry, and at this point it's pretty obvious that, no matter how hard they try, Britney will always be above them.
This!! Britney actually helped Madonna with the collab, at that time Britney didn't really need to collaborate with anybody.
so excited for the coming era 
HIM.
