The internet rocks.

  While  driving,  some  people  insisted on turning on the radio. Well,
  okay.  A song was played --  I  instantly  knew  it.  But  I  couldn't
  remember the title. After some seconds, I realized it's not the song I
  knew but only the melody. The other people couldn't  help  me  finding
  the title. I already heard that melody like 10 or 15 years ago, that's
  for sure.

  I hate that. I must find the name of that song.

  As I came back home, I started my browser and opened the web  page  of
  the  radio  station.  There's  a  playlist  listing  every song with a
  timestamp!  Great.

  Turned out that song was "Criminal" by Britney Spears.  D'oh.   That's
  certainly not what I was looking for.

  Luckily,  there's  an entry in the english wikipedia[1] for that song.
  There's one in the german wikipedia, too, but only the english one has
  a reference to Supertramp's "The Logical Song". Aha!

  I searched on YouTube for that song and listened to it. No. Well, yes.
  That's the melody! But I was sure I first listened to that melody in a
  techno song or something like that.

  Piece  of  cake:  There's a wikipedia entry[2] for "The Logical Song",
  too!  At the bottom, a version by "Scooter"  is  mentioned  --  called
  "Ramp!".  Visiting  YouTube  again.  That's it. Yes, I confess, I once
  listened to Scooter.

  Mystery solved.

  Afterwards, I told a friend of mine about all this. He's  a  musician.
  To  him, that's two different melodies. He admit's that they "may feel
  similar" but it's not the same notes. That's interesting. Seems like I
  perceive  music  in  a  totally  different  way. I, too, can hear that
  there's differences in the notes but they're subtle to  me.  It's  the
  "feeling" that matters most.

  ____________________

  1. http://en.wikipedia.org/wiki/Criminal_(Britney_Spears_song)

  2. http://en.wikipedia.org/wiki/The_Logical_Song