I discovered the song "Young At Heart" a few months ago when I saw Cyrille Aimee perform it. What a beautiful melody!
Yesterday I posted my own arrangement of it to YouTube. It works great in this style (though my video isn't strictly gypsy jazz -- the rhythm is more of a fingerstyle thing).
Chords and tab are here: http://www.soundslice.com/yt/m_g66h58bxg/