Because "Crazy in love" it's about 1/2 of success of "Dangerously in love" and "Halo" it's 1/3 of success of "I am ... Sasha Fierce" .

Because Crazy in Love has more physical sales and is responsible for more physical copies of its parent album. Both factors are weighed more heavily in the formula. Also, Crazy in Love is really the only song from Dangerously in Love that is still significantly streamed today, so it gets the lion's share of the album units. Meanwhile, although Halo is the most popular song from I Am...Sasha Fierce, it still has to share album units with songs like Single Ladies, If I Was a Boy and to a lesser extent, Diva.

I'm currently working on a project to make a singles ranking that takes this principle into account. It uses a formula of album sales+physical singles+digital downloads/1.5+on-demand streams/500+video streams/750. The current top 10 is very similar, but modern songs are MUCH higher on the list (highest is Shape of You at #13), and older songs with more downloads/streams wind up placing higher (BoRhap is #4, Take it Easy is outranked by Don't Speak, etc)

Niggas in paris shows up twice here. Once with Jay-z and one time with just kanye at 795 and 807. I assume that this is an error.

Can you show me that list?

Numb also appears twice at 257 and 284

I am totally for the equivalent album sales and congratulate for the harmonization of all income sources for an album, ending up with something we can compare oranges with oranges, instead of artichokes. And with the growth of the website, I have no doubt that these numbers are starting to be quoted with some level of seriousness throughout the www. However, when it comes to the singles / songs, that's where the cookie usually crumbles as noted throughout the numerous comments. This methodology (EAS) being used for singles / songs becomes unusable and discredited by most - no other website, certification program, label, chart uses this methodology for singles. Singles are singles and when it comes to giving them an equivalent value, these should be the universal equivalent single sales metric. 1 million ESS earn you platinum, not a dissection of the EAS - sort of like having to reverse engineer the numbers. It's an opinion voiced by many which I agree with, but again the website is yours so if you want to calculate by equivalent bananas that is your business and no one else's. All I can do is congratulate you on the good parts of this website. No hate, just an opinion.

Are you done?

I want to hold your hand by The Beatles hasn't increased in total sales in at least 8 months. 85th at the time REALLY?? Top 100 Best-Selling Songs of All Time (youtube.com). I assume the updates are not working