For Bey I would definitely say Irreplaceable. I think it's a good record and I really enjoy it, but it's not even close to being the best offering on B(ible)Day and for it to become the lone monster hit off of that album it's just like??? Bye.
baby one more time,britney
single ladies(apart from the video the song is not all that),bey
poker face,lady gaga
we found love(it aint all that),rihanna
Best Thing I Never Had because I find it to be one of the worst song's she's recorded and it being the highest charting single of the 4 era is just… incomprehensible. However I get it because that time in music was a dark one.
K$ - Supernatural
Rih - Don't Stop The Music/Rude Boy
Bey - Me, Myself and I (I genuinely couldn't think of one but I guess it gets spoken about as one of her best a lot and I don't overly love it)