"Halo", "Single Ladies", "Crazy in Love" are by far her biggest and most celebrated hits worldwide ..
No one cares about or remembers "Telephone"
I would even go as far as saying DIL is a bigger hit, simply because it got a lot of airplay and people all around the world know the song and celebrate it. I think Drunk in Love will definitely become a song beyonce is going to be remembered for. Telephone, however not.
Telephone is the latest though. Of course, Crazy in Love, Irreplaceable etc. are global hits. Telephone is the most recent, if it counts as a goobal hit.
Crazy In Love was not as global as Telephone, but overall is bigger WW.
Same with Single Ladies.
Telephone however sold 6-7M copies outside the USA, which is HUGE and not even Katy, Rihanna etc. have done that. (Only Kesha wiht Tik Tok and Gaga with BR and PF)..
I would even go as far as saying DIL is a bigger hit, simply because it got a lot of airplay and people all around the world know the song and celebrate it. I think Drunk in Love will definitely become a song beyonce is going to be remembered for. Telephone, however not.
Not the Bey Hive not reading the OP. The question being asked is if it's her most global hit, not biggest hit, and the answer is yes as proven by the chart peaks around the world.