'O Saathiya' is sung by Armaan Malik & Asees Kaur. The lyrics for the song and the music is composed by Arko.
'Sweetiee Weds NRI' is slated to release on 2nd June, 2017.
[video source - youtube]
Incase you haven't seen it yet, check out the trailer of 'Sweetiee Weds NRI' HERE.