Salman Khan-starrer Kisi Ka Bhai Kisi Ki Jaan is all set to release on April 21 and the film is in the news, more so after the trailer was released on Monday, April 10. In a unique strategy, the first song of the film ‘Naiyo Lagda’ was released way back on February 14. The track became a huge hit and the makers then released ‘Billi Billi’.