Here is the complete list of unlockable trophies in Just Dance 3 for the PS3.
There aren’t any secret trophies in this game.
Ace Pair (Silver) – Finish any Duet with 2 players getting at least 3 stars on both choreographies
Big Band Theory (Gold) – Finish any Dance Crew with all 4 players getting at least 5 stars
Constellation Maker – Bronze (Bronze) – Get at least 1 star on every choreography in the “Songs” tab
Constellation Maker – Gold (Gold) – Get 5 stars on every choreography in the “Songs” tab
Constellation Maker – Silver (Silver) – Get at least 3 stars on every choreography in the “Songs” tab
Eyes Wide Shut (Bronze) – Get 5 stars on any song after disabling pictograms in the options menu
Get Mashed! (Bronze) – Get 5 stars on a Dance Mash-up song
Halfway There! (Silver) – Collect 260 stars
Highway to the Stars (Bronze) – Get 5 stars on 2 songs in a row (excluding Speed Shuffle & Simon Says)
Just Dancer – Gold (Gold) – Play 150 songs
Just Dancer – Silver (Silver) – Play 75 songs
Just Dance Legend (Platinum) – Earn every Trophy in Just Dance 3
Just Dancer – Bronze (Bronze) – Play 10 songs
Light Speed (Bronze) – Play 20 songs in a row on Speed Shuffle
Magnificent Medley (Bronze) – Get 3 stars or more on 3 Medleys
Marathon – Bronze (Bronze) – Play 5 songs in a row on Non-Stop Shuffle
Marathon – Gold (Gold) – Play 30 songs in a row on Non-Stop Shuffle
Marathon – Silver (Silver) – Play 15 songs in a row on Non-Stop Shuffle
On Fire! (Bronze) – Perform well enough to catch “On Fire!” during a song
Perfectionist – Bronze (Bronze) – Finish any song with 80% “Good” or “Perfect” moves
Perfectionist – Gold (Gold) – Finish any song with 100% of “Good” or “Perfect” moves
Perfectionist – Silver (Silver) – Finish any song with 90% “Good” or “Perfect” moves
Shaky Simon (Silver) – Get at least 1000 points on every “SHAKE” move on Simon Says Mode
Stylist (Bronze) – Get 5 of the 7 different styles
Sweat & Score (Silver) – Reach 400 Sweat Points with a 4-star rating on any song
Sweat Me a River – Bronze (Bronze) – Earn 1000 Sweat Points
Sweat Me a River – Gold (Gold) – Earn 30,000 Sweat Points
Sweat Me a River – Silver (Silver) – Earn 10,000 Sweat Points
Sweatin’ Together (Silver) – In a Free Session, finish a song with every player scoring over 300 Sweat Points for that song
You’re Golden (Silver) – Perform 50 Gold moves