first of all Madonna has 13 number 1 hits on the U.k charts...beyonce is not even close to that..second is this a post bout rihanna? third lady gaga is not a single artist people need to stop saying that....10million albums world wide 8 for the fame, 2 for the fame monster and she just came out 2008..man please.. 13 grammys dont mean shit, its obvious they just giving grammy away now..