Maestro
Achieve Diamond Status for every song on the disc
175 
Dedication
Score 50 million points (cumulative in any mode)
100 
Girl’s Best Friend
Get a perfect score throughout a full American Idol tournament
100 
World Idol
Win the full American Idol tournament at Expert difficulty level
80 
Legend
Achieve Diamond Status for twenty different songs
75 
American Idol
Win the full American Idol tournament at any difficulty level
50 
Hero
Achieve Diamond Status for ten different songs
50 
Million Seller
Achieve Platinum Status for every song on the disc
50 
It Didn't Take That Long
Score 10 million points (cumulative in any mode)
50 
American Sensation
Win 20 American Idol single player tournaments
30 
Superstar
Achieve Diamond Status for five different songs
25 
The Showman
Complete a medley and receive Platinum Status
20 
The Great American Songbook
Sing all the songs on the disc once - full song only
20 
It Sounds Like a Lot
Score 1 million points (cumulative in any mode)
20 
Ranked Grudge Match Winner
Win an Xbox LIVE Head-to-Head ranked match
15 
Ranked World Tour Winner
Win an Xbox LIVE American Idol Tournament ranked match
15 
Ranked Global Star Winner
Win an Xbox LIVE Arcade League ranked match
15 
Why Don't You Marry Him Then
Achieve "Excellent" comments from Simon three times in a row during an American Idol tournament
15 
Headbanger
Compete offline in a battle Head to Head game
10 
Premiership
Compete offline in an Arcade League game
10 
Just the Two of Us
Play an offline Co-op Duet
10 
Grudge Match
Play an Xbox LIVE Head-to-Head match
10 
World Tour
Play an Xbox LIVE American Idol Tournament match
10 
Global Star
Play an Xbox LIVE Arcade League match
10 
Megastar
Achieve Diamond Status for one song
10 
Inspiration
Achieve Gold Status for every song on the disc
10 
Golden Ticket
Pass the auditions phase in single player
10 
The First of Many
Achieve Platinum Status for one performance
5