Description: O Yaara (Aisa Kyon Hota Hai) is sung by Shreya Ghoshal, Sonu Nigam. Download O Yaara (Aisa Kyon Hota Hai) mp3song, download O Yaara (Aisa Kyon Hota Hai) mp3 song in 128 kbps and 320 kbps and itune rip also.