Here is the full list of all 12 Hannah Montana: The Movie achievements worth 1,000 gamerscore.
Purchased 100 articles of clothing.
Decorated 30 items with the Hannah Box fashion designer.
Earned a 5 Star rating on all songs.
Earned a 5 Star rating on each stage.
Saved Crowley Meadows.
Finished fixing the chicken coop for Travis.
Performed the Hoedown Throwdown at Meadow Hall.
Earned a 5 Star rating for a performance.
Won the Horse Races game at the Fair against three of your friends.
Won the Bottle Toss game at the Fair.
Received over 100 points on the Frog hop game at the Fair.
Rode Blue Jeans 10 times at Ruby's Farm.