The first Madonna song I liked
I confess... I was not a big fan of Madonna when I first heard this song (Lucky Star, Burning Up, etc. just didn't do anything for me.). The 'hook of this song, however, is great.... I remember a local news station in Oregon even used the hook of this song as their theme at one point (around '84 I think... I remember visiting family there and hearing this on the news caught me by surprise).
I think the song that made me a Madonna fan, however, was "Oh, Father" a few years later.... just an incredibly beautiful song.