In the Season 4 opener, four bakers compete to have their cupcakes showcased at a party celebrating the opening night of the New York City Ballet's The Nutcracker.

In the Season 4 opener, four bakers compete to have their cupcakes showcased at a party celebrating the opening night of the New York City Ballet's The Nutcracker.

Four bakers battle for a place at the Hollywood Christmas Parade.

Four bakers battle for a place at the Hollywood Christmas Parade.

Returning bakers, who all lost previously, come back to fight for redemption. They create cupcakes inspired by the TV series, The Closer (2005), in hopes of having their confections featured at the show's 100th-episode celebration.

Returning bakers, who all lost previously, come back to fight for redemption. They create cupcakes inspired by the TV series, The Closer (2005), in hopes of having their confections featured at the show's 100th-episode celebration.

Bakers battle for a place at a party celebrating the Los Angeles opening of the Broadway musical, Wicked.

Bakers battle for a place at a party celebrating the Los Angeles opening of the Broadway musical, Wicked.

Soccer-themed cupcakes are created by four bakers, who are competing to have their confections showcased at MLS Soccer Cup Finals celebration.

Soccer-themed cupcakes are created by four bakers, who are competing to have their confections showcased at MLS Soccer Cup Finals celebration.

Returning champs fight to present their cupcakes at an American Music Awards after party.

Returning champs fight to present their cupcakes at an American Music Awards after party.

Four cupcake artists create football-theme sweets, in hopes of having their confections showcased at the 2012 Rose Bowl VIP party.

Four cupcake artists create football-theme sweets, in hopes of having their confections showcased at the 2012 Rose Bowl VIP party.

Cupcake bakers vie for a place at a star-studded event, celebrating the 60th anniversary of I Love Lucy (1951).

Cupcake bakers vie for a place at a star-studded event, celebrating the 60th anniversary of I Love Lucy (1951).

Bakers battle to have their cupcakes showcased at the Los Angeles celebration of Chinese New Year.

Bakers battle to have their cupcakes showcased at the Los Angeles celebration of Chinese New Year.

Cupcakes take center stage at a VIP party for the biggest stars of opera.

Cupcakes take center stage at a VIP party for the biggest stars of opera.

Bakers battle for a place at the Pre-Race Pit Party for Monster Truck Jam.

Bakers battle for a place at the Pre-Race Pit Party for Monster Truck Jam.

Cupcake bakers try to scare their way into the VIP party for Screamfest Horror Film Festival in Los Angeles. Actor/director Eli Roth is a guest judge.

Cupcake bakers try to scare their way into the VIP party for Screamfest Horror Film Festival in Los Angeles. Actor/director Eli Roth is a guest judge.

It's a first-ever Cupcake Wars all-vegan showdown, to have their cupcakes showcased at the inaugural Los Angeles Green Festival.