The 23rd Annual Nickelodeon Kids' Choice Awards took place in Los Angeles last night, causing celebrities to come out to spend some time and dodge some slime:

Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Every year, someone wears something that makes you think, "Really? To the Kids' Choice Awards? For real?" This year, that person is Katy Perry.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Her shoes were pretty nifty, though.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Teen queen Demi Lovato kept it simple in a little black dress...


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

while her boyfriend, Joe Jonas, was forced to stand in between his two less stylish brothers, who conspired to arrive looking like the sad, lost children of Orville Redenbacher.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

iCarly's Miranda Cosgrove rocked an adorable magenta party dress...


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

while Rosario Dawson went for a simple and comfy-looking white frock.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Tyra was naturally working the smize and the pose. I really love red and yellow together, even though it kind of reminds me of the inside of the top of a McDonald's hamburger bun.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

I'm pretty sure Tyra demanded that Justin Bieber smize as hard as possible right before this shot was taken.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Selena Gomez, keeping the "tween stars in adorable dresses" trend of the evening going strong.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Oh, Taylor Lautner. This kid just never looks comfortable on the red carpet.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Unlike Zoe Saldana, who looks totally adorable and relaxed.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

How do you guys feel about Rihanna's sock/shoe combo?


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Snoop brought his family along...


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

and Shaun White brought some special guests, as well.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Robert Downey, Jr. was at the show, looking like Colin Farrell's slightly nerdy older brother, for some reason.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Jada Pinkett Smith was there to support her son, Jaden...


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

who was there to help promote his new film, The Karate Kid, with Jackie Chan.


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

But everyone knows the best part of the show is the slime, which fell on Katy Perry...


Prime Time Slime Time At The Nickelodeon Kids' Choice Awards

Though I think Steve Carell and Tina Fey wore it best, don't you?

[All Images via Getty.]