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