Leave her alone.
She started with pon de replay then SOS then unfaithful then Umbrella then she blew the F up and became a standard for pop music.
It happens, just accept it. No need to call her talentless, you sound mad for some reason.
No one is really super famous based on talented anymore (MJ,bob marley,r kelly,etc those days are dead) thats not how music works these days sadly. Its about just being lucky to be picked by the industry machine for a set of random reasons(looks,sex appeal,personality). Then you get that almighty radio/tv plug and then its up to the people to decide if you have the right stuff to last a lifetime(mindless kids and horny highschoolers mostly).