Bibi Sanam Jaanam, Anaar-e-Sistaanam (or Anar-i-Sistanam) is an Afghan folk song that became very popular after Zeb and Haniya performed it on Coke Studio (Pakistan).
Now the film Cabaret has gotten a version of the song, where the lines 'Bibi Sanam Jaanam, Anaar-e-Sistaanam' are there as in the original folk song, though the latter lines are different. The words 'Bibi Sanam Jaanam' simply mean Dear, beloved lady, and 'anaar-i-sistaanam' means a pomegranate of Sistan, which is a place in Iran, where the pomegranates are supposed to be very sweet. So the entire line basically means 'Dear, beloved lady, sweet like the pomegranate of Sistan.'
Now the film Cabaret has gotten a version of the song, where the lines 'Bibi Sanam Jaanam, Anaar-e-Sistaanam' are there as in the original folk song, though the latter lines are different. The words 'Bibi Sanam Jaanam' simply mean Dear, beloved lady, and 'anaar-i-sistaanam' means a pomegranate of Sistan, which is a place in Iran, where the pomegranates are supposed to be very sweet. So the entire line basically means 'Dear, beloved lady, sweet like the pomegranate of Sistan.'