There are 29 Trophies that can be collected

Bronze

Dice
Your first song (one singer)

T-Rex
Your first dance (one dancer)

Church Hop
Your first song (two singers)

Leg Kick
Your first dance (at least 2 dancers)

Robot
Sing: Obtain 5 Stars on 5 different Easy songs

Heel Groove
Dance: Obtain 5 Stars on 5 different Easy Songs

Click-Click Chest
10 different songs (one singer)

Hop Walk
10 different dances (one dancer)

Shuffle
10 different songs (two singers)

Step-Shuffle-Pow
10 different dances (at least 2 dancers)

Monster Poses
Save 10 photos

Monster Breakdown
Save 10 videos

Rock and Pop
Reach every gold note on 5 different songs

Funky Rocks
While singing, obtain at least "OK" on every line

BackPack
Post 10 photos on your Facebook profile

Silver

Jackson Walk
Achieve all gold moves on 5 different songs

Kick, Freeze and Repeat
20 different songs (one singer)

Cross With Scoot
20 different dances (one dancer)

Military March
20 different songs (two singers)

Gallup
20 different dances (at least 2 dancers)

Butterfly
Sing: Obtain 5 Stars on 5 different Medium songs

Hot Feet
Dance: Obtain 5 Stars on 5 different Medium songs

Gold

Slide Glide
29 different songs (one singer)

360 Airwalk
29 different dances (one dancer)

Lock and Pop
29 different songs (two singers)

Zero Gravity Lean
29 different dances (at least 2 dancers)

Never-Ending Spin
Sing: Obtain 5 Stars on 4 different Hard songs

Toe Stand
Dance: Obtain 5 Stars on 4 different Hard songs

Platinum

Moonwalk
Obtain all trophies from the game!

http://www.ps3trophies.com/forums/trophy-news/58983-michael-jackson-experience-trophy-list.html