Blow up the blimps and get the slime ready because the 2015 Nickelodeon Kids' Choice Awards nominations have been revealed, and it's all about the ladies, the newbies and the superheroes.

A ton of stars -- Iggy Azalea, Sam Smith, 5SOS, Meghan Trainor, Chris Pratt, Fifth Harmony -- are competing for their very first orange blimp, and they'll be taking on veteran nominees at the 28th annual awards show, hosted by Nick Jonas.

It's going to be a battle of the pop divas in the Favorite Song of the Year category as Taylor Swift's "Shake It Off," fights it out with Katy Perry's "Dark Horse," Jessie J, Ariana Grande and Nicki Minaj's "Bang Bang," and Meghan Trainor's 2014 hit, "All About That Bass."

Meghan also nabbed a nomination in the Favorite New Artist category, where she takes on 5SOS, her frequent collaborators Fifth Harmony, Echosmith, Iggy and Jessie J.

One Direction are vying for their fifth Kids Choice Award as they take on Coldplay, Fall Out Boy, Imagine Dragons, Maroon 5 and OneRepublic in the favorite music group category.

Both the big- and small screen will be recognized at the awards show, airing Saturday, March 28 at 8 p.m. ET/PT, as superheroes take over the movie categories with "X-Men: Days of Future Past" and "The Amazing Spider-Man 2" each getting five nominations, including Spidey stars Emma Stone (Favorite Movie Actress) and Andrew Garfield (Favorite Male Action Star).

Beginning Friday (Feb. 20), fans can cast their votes across 21 categories, including three new ones (Favorite Talent Competition Show, Favorite Family TV Show and Most Addicting Game), at nick.com/kca or by tweeting #KCA.

Take a look at some of your favorite categories, and click right here for the full list of nominees.

Favorite Song Of The Year:

"All About That Bass," Meghan Trainor

"Bang Bang," Jessie J, Ariana Grande, & Nicki Minaj

"Dark Horse," Katy Perry

"Fancy," Iggy Azalea feat Charli XCX

"Problem," Ariana Grande feat Iggy Azalea

"Shake It Off," Taylor Swift

Favorite Music Group:

Coldplay

Fall Out Boy

Imagine Dragons

Maroon 5

One Direction

OneRepublic

Favorite Male Singer:

Blake Shelton

Bruno Mars

Justin Timberlake

Nick Jonas

Pharrell Williams

Sam Smith

Favorite Female Singer:

Ariana Grande

Beyoncé

Katy Perry

Nicki Minaj

Selena Gomez

Taylor Swift

Favorite New Artist:

5 Seconds of Summer

Echosmith

Fifth Harmony

Iggy Azalea

Jessie J

Meghan Trainor

Favorite Movie:

"Guardians of the Galaxy"

"Maleficent"

"Teenage Mutant Ninja Turtles"

"The Amazing Spider-Man 2"

"The Hunger Games: Mockingjay - Part 1"

Transformers: Age of Extinction

Favorite Movie Actor:

Ben Stiller, "Night at the Museum: Secret of the Tomb"

Hugh Jackman, "X-Men"

Jamie Foxx, "The Amazing Spider Man 2"

Mark Wahlberg, "Transformers: Age of Extinction"

Steve Carell, "Alexander and the Terrible, Horrible, No Good, Very Bad Day"

Will Arnett, "The Lego Movie"

Favorite Movie Actress:

Angelina Jolie, "Maleficent"

Cameron Diaz, "Annie"

Elle Fanning, "Maleficent"

Emma Stone,"The Amazing Spider-Man 2"

Jennifer Garner, "Alexander and the Terrible, Horrible, No Good, Very Bad Day"

Megan Fox, "Teenage Mutant Ninja Turtles"

Favorite TV Actor:

Benjamin Flores Jr., "The Haunted Hathaways"

Charlie McDermott, "The Middle"

Grant Gustin, "The Flash"

Jack Griffo, "The Thundermans"

Jim Parsons, "The Big Bang Theory"

Ross Lynch, "Austin & Ally"

Favorite TV Actress:

Chloe Bennet, "Agents of S.H.I.E.L.D."

Debby Ryan, "Jessie"

Jennifer Morrison, "Once Upon a Time"

Kaley Cuoco-Sweeting, "The Big Bang Theory

Kira Kosarin, The Thundermans"

Laura Marano, "Austin & Ally"