Agar Tum Sath Ho Song Video Download HD | Tamasha | Alka Yagnik & Arijit Singh: Here is the another track released from the Ranbir Kapoor and Deepika Padukone starring movie Tamasha. The latest track Agar Tum Sath Ho is melodious song sung by Alka Yagnik along with Arijit Singh. The song is composed by