You level up by taking part in talent shows and performing well.
Unfortunately you can only take part in one talent show a day. However, if you go offline and keep manually advancing your consoles calendar after each talent show via the dashboard, you should have this in around twenty days or so (assuming you consistently earn overall golds each time).
IMPORTANT It has been noted by other TA members that you MUST start this in offline mode. Starting the game in online mode will render the achievement unobtainable via the method described above.