(Dan) Just approved! - The most people singing a national anthem simultaneously is 5,857 and was achieved by I Own Pakistan (Pakistan) at the DA Zamzama Club, Karachi, Pakistan, on 14 August 2011. The participants sang the Pakistan National Anthem 'Pak Ser Zameen Shad Baad' on the country's independence day. https://www.facebook.com/photo.php?fbid=10150362451829032&set=a.433038889031.230483.6732359031&type=1&theater