It happened thrice till date when a Sunny Deol and an Aamir Khan starrer movie release in a same month. 1) Ghayal, Dil (June 1990) 2) Ghatak, Raja Hindustani (November 1996) 3) Gadar: Ek Prem Katha, Lagaan (in this case even the date was same 15 June 2001)
The film shows various members of Sakeena's family singing Que Sera, Sera (Whatever Will Be, Will Be) during pre-partition India (pre-1947). However, this song was first published in 1956.