I recently purchased The Best of Dolores Keane, in which she sings a nice version of Lili Marlene (in English). No indication in the notes as to why the Irish lady chose that particular song.

The defining version, of course, is that of Lale Andersen. You can find a clip of her version (cut #7) at tunes.com, along with many other songs on the CD VE Day, 50th Anniversary Musical Memories. At 31 songs for $10.99, it is a real bargain. It contains segments of speeches, as well as songs from several countries, not just the United States.