24th March: Bollywood superstar Shah Rukh Khan was seen at the birthday party of film producer Karim Morani in Mumbai. Popular Punjabi singer Mika Singh was one of the invitees and he crooned to his recently released single Billo. The superstar, who was dressed casually in black, sang along ‘Billo’ along with Mika. Karim Morani is known to be SRK’s closest friend in the industry.