…URDU >560-600 million…estimated 160 million Pakistani’s atleast 80% know Urdu…add to that all those who enjoy Bollywood Movies…
More than Half of India if not more knows Bollywood Urdu…
580 million…
Expats (Urdu Speeaking) from Sub Continent…20 million
All Arabs in the Holy Cities know Urdu…3-5 million
All of GupShup…0.3 million…
Believe it or Not URDU may be second most spoken language on Earth…:biggthumb
Correction all this is from Sina gazzette…but seems plausible! 
…URDU >560-600 million…estimated 160 million Pakistani’s atleast 80% know Urdu…add to that all those who enjoy Bollywood Movies…