'Prem Mein Tohre' is sung by Asha Bhosle. The lyrics for the song is written by Kausar Munir and the music is composed by Anu Malik.
'Begum Jaan' is slated to release on 14th April, 2017.
[video source - youtube]
Incase you missed, check out the trailer of 'Begum Jaan' HERE.