The Nickelodeon Kids' Choice Awards roll into LA on Saturday, which means it's time for celebrities to be very afraid — at any moment, they could be slimed. Through the years, we've seen plenty of stars coated in green gunk, from Kristen Stewart 's slimy hug to Justin Timberlake 's slime fight to Josh Duhamel  becoming the reigning king of slime time. Scroll through to see 23 of the best moments of celebs in the slimelight, and then tune in for the show to see who comes out green.
Justin Bieber  got slimed in 2012.
Kristen Stewart  hugged a slimed Sandra Bullock  alongside Neil Patrick Harris  in 2013.
In turn, Kristen had to wipe some slime off her shirt.
Mary-Kate and Ashley Olsen  hugged as they got slimed in 2004.
Pink got some surprise pink slime in 2002.
Halle Berry  was taken by surprise when she got slimed in the audience in 2012.
Jim Carrey  screamed through the slime back in 2003.
Justin Timberlake  and Vince Vaughn  hosed each other with slime in 2007.
Katy Perry  got a blast of slime in 2010.
Katy Perry  hugged Jonah Hill  after getting slimed in 2010.
Jack Black  and Orlando Bloom  high-fived after getting some serious slime time in 2008.
Will Ferrell  had slime poured on him like Gatorade in 2005.
Tina Fey  and Steve Carell  embraced the slime in 2010.
Johnny Depp  had slime rain down on him in 2005.
Nick Cannon had a serious laugh when Heidi Klum  got slimed in 2011.
Jane Lynch  splashed Jason Segel  with slime in 2011.
Snoop Dogg couldn't handle the slime in 2011.
Chris Colfer got a face full of slime in 2012.
Adam Sandler  had slime coming at him from every direction in 2002.
Taylor Lautner  was soaked in slime in 2012.
Steve Carell  and Tobey Maguire  tried to stop the slime in 2007.
Jack Black  sprayed slime at Robin Williams  in 2006.
Josh Duhamel  was the king of the slime in 2011.