sorry but there are only 13 2x platinum Official Rihanna singles...
LTWYL, LYL, RTT, TC, THE MONSTER don't count cause she is featured artist
SOS and "hate that i love you" were never confirmed as double platinum
all this with 7 albums...
now let's see what Katy have done... 12 2x platinum OFFICIAL singles (not even one as featured artist) with ONLY 3 albums... not to mention that Dark Horse needs about a month to go double platinum too! and then they will be equal...............................thank you so much