MY favourite interpretation of Lilli Marlene is neither by Lale Anderson or Marlene Dietrich.
It's by Musikkorps 6 (Hamburg) der Bundeswehr (later Heeresmusikkorps VI) under Oberstleutnant Gerhard Scholz in the Drei Lilien Drei Lilien potpourri (1959). If anyone has ever heard this potpourri, you would know that's a truly march music!
P.S. The same potpourri I mentioned has the best interpretation of Westerwaldlied, Lore-Lore-Lore, Hamburg ist einen Schoenes Stadtchen, Panzerlied and of course Lili Marleen