There are 51 Trophies that can be collected.

BRONZE

Running Things in Rome!
Finish Rome City Events

Pisa Cake!
Finish Pisa City Events

The Whole Frenchilada!
Finish Paris City Events

Lon-Done!
Finish London City Events

Aye Aye, Skipper!
Finish A Mission for Skipper

Yes, Your Highness!
Finish A Mission for King Julien

Colossal!
Complete the Colosseum Publicity Stunt

Belisima!
Complete the Leaning Tower Publicity Stunt

What an Eye Full!
Complete the Eiffel Tower Publicity Stunt

Towering Bridge Star!
Complete the Tower Bridge Publicity Stunt

Back to the Big Apple
Get the Gang to New York

Roman City Superstar
Complete all Rome City events with 5 Stars

Arrivederci, Rome!
Finish Rome Circus

Ciao, Pisa!
Finish Pisa Circus

Au Revoir, Paris!
Finish Paris Circus

Farewell, London!
Finish London Circus

King of the Circus
Finish New York Circus

Ticket to Adventure!
Get 5 Stars in any Ticket Sales

Boss of the Toss!
Get 5 Stars in any Snack Toss

A Sure Hit!
Get 5 Stars in any Cannonball Act

3 Rings of Fun!
Get 5 Stars in any Flaming Rings Act

High Wire Highness!
Get 5 Stars in any High Wire Act

A Proper Send-Off!
Get 5 Stars in any Trapeze Act

Roman Circus Superstar
Get 5 Stars in all Rome Circus Acts

The Circus is Coming to Town
Complete All Poster Races

Scrapwood Surplus!
Find All the Scrap Wood Skipper Needs

Au Revoir, Dubois!
Defeat Chantal Dubois

Wild About the Circus!
Free All Captured Compadres

Lemur Located: Rome
Find Mort in Rome

Lemur Located: Pisa
Find Mort in Pisa

Lemur Located: Paris
Find Mort in Paris

Lemur Located: London
Find Mort in London

Mort is Everywhere!
Find Mort in all Cities

You Went Bananas!
Get 5 Stars in any Banana Race

SILVER

All Aboard for Adventure!
Finish Italian Countryside Tutorials

Pisa City Superstar
Complete all Pisa City events with 5 Stars

Paris City Superstar
Complete all Paris City events with 5 Stars

London City Superstar
Complete all London City events with 5 Stars

Penguin Problem Solved!
Get all the Items Skipper Needs

For King Julien
Complete All King Julien's Tasks

Biggest Star Under the Big Top!
Get 5 Stars in each Circus Act

Pisa Circus Superstar
Get 5 Stars in all Pisa Circus Acts

Paris Circus Superstar
Get 5 Stars in all Paris Circus Acts

London Circus Superstar
Get 5 Stars in all London Circus Acts

New York Circus Superstar!
Get 5 Stars in all New York Circus Acts

The Ultimate Showman!
Find all 195 Stars for Alex

Circus Beauty!
Find all 195 Flowers for Gloria

A Real Blast!
Find all 195 Cannonball Balloons for Marty

A Rare Sight!
Find all 195 Thermometers For Melman

GOLD

International Superstar
Get 5 Stars on All City Events

PLATINUM

Everything!
Earn every trophy in the game

http://www.ps3trophies.com/forums/playstation-trophy-news/17505-madagascar-3-video-game-trophy-list.html