Unlock the following skins by performing the corresponding tasks:

SKIN - HOW TO UNLOCK
Banshee "Think About" skin - Win the Paris Sewers Gauntlet.
Banshee "Ludwig" skin - Find all hidden packages in Seoul Stream.
Cutthroat "Corner Pocket" skin - Win an Xbox Live multiplayer Paris Sewers race.
Cutthroat "Sizzle" skin - Win the Storming Asgard Ring Master Expert.
Damn the Torpedoes "Big Top" skin - Win the Lake Powell novice race.
Damn the Torpedoes "Buzzed" skin - Find all hidden packages in Tsunami Bowl.
Miss Behave "Four of a Kind" skin - Win the Storming Asgard Gauntlet.
Miss Behave "Reno" skin - Find all Storming Asgard hidden packages.
Rad Hazard "All Your Base" skin - Win an Xbox Live multiplayer Seoul Stream race.
Rad Hazard "Hawkeye" skin - Win the Lost Babylon Ring Master Expert.
Razorback "R.I.B.S." skin - Win an Xbox Live Multiplayer Area 51 race.
Razorback "Flower Power" skin - Win the Lake Powell Ring Master Expert.
Thresher "Li'l Devil" skin - Win the Storming Asgard race.
Thresher "Irie" skin - Win the Tsunami Bowl Gauntlet.
Tidal Blade "Bad Luck" skin - Win the Seoul Stream Ring Master Pro.
Tidal Blade "Razzle Dazzle" skin - Find all hidden packages in Paris Sewers.
Vector "Pieces Of Eight" skin - Win the Tsunami Bowl Ring Master.
Vector "One Way" skin - Find all hidden packages in Lake Powell.