Well I don't like the way these are ranked out but basically I never liked WFL and I despise Diamonds ever since my brother played the **** out of it non stop to the point of me going insane.
Umbrella vs Crazy In Love We Found Love vs Irreplaceable Diamonds vs Single Ladies.
Rihanna >
Single Ladies is just the PITS. Filler from MOTS is better than that song. I will say that Irreplaceable would have won if it was pitted against Diamonds.
Rihanna has more WW hit songs with Umbrella and We Found Love being the biggest ones but Only Girl, Whats My Name, Diamonds, Rude Boy, Don't Stop the Music, Take a Bow, Disturbia, S&M etc. can easily take 3rd spot.
Beyonce has 3 obvious signature songs (Crazy in Love, Irreplaceable, Single Ladies) though Halo is more global than CIL and SL.