Use the following actions to start the corresponding celebration.

Celebration	How to unlock
Backflip	Hold L1 and tap Right Analog-stick Up(2).
Bird Walk	Hold L2 then tap Right Analog-stick Left(2).
Bottom Dance	Hold L1 and press Square(2).
Brick Fall	Hold L2 then hold Right Analog-stick Left.
Cartwheel	Hold L2 and rotate the Right Analog-stick clockwise
Chest Slide	Hold L1 and tap Right Analog-stick Down, Right Analog-stick Up.
Double Backflip	Hold L1, and rotate the Right Analog-stick counterclockwise.
Front Flip	Hold L2 then tap Right Analog-stick Up(2).
Hand Spring	Hold L1 and rotate the Right Analog-stick clockwise.
Hands on Ears	Hold L2 and press Square(2).
Head Shake	Hold L1 and tap Right Analog-stick Left, Right Analog-stick Right.
Heel Taps	Hold L2 and press Triangle(2)
I Can't Hear You	Hold L2 then hold Right Analog-stick Right.
If I Catch You	Hold R2 and press R3.
Kiss the Pitch	Hold R2 and press Circle(2).
Knee Slide	Hold L2 then tap Right Analog-stick Up, Right Analog-stick Down.
Knee Slide Arms Out	Hold L2 then tilt and hold the Right Analog-stick Up.
Knee Slide to Sit	Hold L2 then tap Right Analog-stick Down(2).
Le Cirque LaBelle	Hold L2 then tap Right Analog-stick Down, Right Analog-stick Up.
Moonwalk	Hold R1 then tap Right Analog-stick Left(2).
Movember	Hold L2 and press Circle(2).
Peacock	Hold R1 and press Circle(2).
Pit Bull	Hold R1 and press Circle.
Point to the Sky	Hold L1 and press Circle.
Punch & Dodge	Hold L1 then tilt and hold the Right Analog-stick Left.
Robot	Hold L2 and click R3.
Samba Dance	Hold L2 then tap Right Analog-stick Left, Right Analog-stick Right.
Shoe Shine	Hold L2 and press Circle.
Show Respect	Hold L1 and press Circle(2).
Side Slide	Hold L2 then hold Right Analog-stick Down.
Signature Finishing Move	Press X.
Spanish Archer	Hold L2 and press Triangle.
Standing Archer	Hold L1 then tilt and hold Right Analog-stick Right.
Surfer	Hold R1 then hold Right Analog-stick Left.
Telling Off	Hold R2 and press Circle.
The Salute	Hold R1 and press Triangle.
Twist Flip	Hold L2 then rotate Right Analog-stick counterclockwise.
Violinist	Hold L2 and press Square.
Water Hose	Hold R2 then tap Right Analog-stick Down(2)
Who Am I	Hold L2 then tap Right Analog-stick Right, Right Analog-stick Left.
Why Always Me	Hold R1 then press Triangle(2).