'Sau Aasmaan', a new song from the Katrina Kaif and Sidharth Malhotra starrer 'Baar Baar Dekho' has been released. Picturised on Katrina and Sidharth, the song has been composed by Amaal Mallik and sung by Armaan Malik and Neeti Mohan. Directed by Nitya Mehra, 'Baar Baar Dekho' will release on September 9.