'Single Rehne De', a new song from the Kangana Ranaut starrer upcoming film 'Simran' has been released. The song has been composed by music composer duo Sachin-Jigar with vocals by Shalmali Kholgade and Divya Kumar. Vayu has penned the song's lyrics. Directed by Hansal Mehta, 'Simran' is scheduled to release on September 15.