The Vans Warped Tour celebrates its 21st birthday this year and to mark the occasion, held a kickoff celebration in Los Angeles on April 7.

The Vans Warped Tour celebrates its 21st birthday this year and to mark the occasion, held a kickoff celebration at Club Nokia in Los Angeles on Tuesday night (April 7).

The event brought just a taste of what will come this summer, with performances by ho99o9, Bebe Rexha and Candy Hearts, an eclectic mix that clearly illustrates what tour founder, Kevin Lyman, was aiming for.

Warped Tour began as a festival dedicated to rock and punk bands like Blink-182 and Rancid, but since its inception in 1994, there have been more than a few changes, including the addition of acts outside the rock genre.

Longtime visionary Lyman says he wanted a diverse lineup to mirror concert-goers equally varied taste in music, but that's meant receiving more than his fair share of criticism for booking bands in genres like pop (Katy Perry famously headlined in 2009) and screamo to the bill. This year's lineup includes such acts as Riff Raff, Black Veil Brides, Kosha Dillz and Senses Fail along with addition of comedians and YouTube stars to the bill.

“If it sucks so bad, don’t go," Lyman cracked. "Start your own festival. I’ve been saying it since 1997, there’s got to be a kid in a garage somewhere who’s gonna kick my ass one day and put me out of business."

Until then, however, Lyman is looking out for the parents, offering one complimentary ticket for any child under 18 to bring along their adult (over 28) guardian/parent. Once at the venue, they have the option to chill in a parents tent, which features air conditioning, magazines and movies. Or, the tour's founder added, "the comedy tent will be a great place for parents to hang out.”

See the full Warped Tour 2015 lineup below:

'68

A+ Dropouts

Aaron West and The Roaring Twenties

Alive Like Me

Alvarez Kings

American Opera

As It Is

Ascot Royals

Asking Alexandria

Attila

August Burns Red

Baby Baby

Beartooth

Beautiful Bodies

Bebe Rexha

Being As An Ocean

Black Boots

Black Veil Brides

blessthefall

Born Cages

BoyMeetsWorld

Brian Marquis

Buttons

Candy Hearts

Carousel Kings

ChrisB

Citizen

Crossfaith

Drama Club

Emarosa

Escape The Fate

False Puppet

Family Force 5

Fit For A King

Grey Gordon

H2O

Handguns

Hands Like Houses

Have Mercy

ho99o9

Hundredth

I Killed The Prom Queen

Icon For Hire

Jule Vera

Juliet Simms

KAYA

Knuckle Puck

Koji

Koo Koo Kanga Roo

Kosha Dillz

Le Castle Vania

Lee Corey Oswald

M4Sonic

Major League

Mallory Knox

Man Overboard

Matchbook Romance

MC Lars

Meghann Wright

Memphis May Fire

Metro Station

Miss May I

Mod Sun

Moose Blood

Motion City Soundtrack

Neck Deep

Never Shout Never

New Beat Fund

New Years Day

Night Argent

Night Riots

Onward, Etc.

Our Last Night

Palisades

PUP

Pvris

Riff Raff

Rivers Monroe

SayWeCanFly

Seaway

Senses Fail

Set It Off

Silverstein

Sirens and Sailors

Slaves

Speak Low If You Speak Love

Splitbreed

Svetlanas

TAT

The Amity Affliction

The Dirty Nil

The Karma Killers

The Kenneths

The Relapse Symphony

The Wonder Years

This Wild Life

Transit

Trophy Eyes

We Came As Romans

While She Sleeps

Youth In Revolt

Comedians:

Beth Stelling

Chase Bernstein

Dave Ross

Eli Olsberg

Eric Schwartz

Grant Cotter

Sammy Obeid

Sandy Danto

YouTubers:

Austin Jones

Bryan Stars

Damon Fizzy

Johnnie Guilbert

Jordan Sweeto