The 25th annual Nickelodeon Kids' Choice Awards were announced on 31 March, with Taylor Swift, Selene Gomez, Adam Sandler and Justin Beiber walking the limelight.

The throwing of green slime, which is a tradition at the Kids' Choice Awards, was taken in good spirit by various celebrities who attended the function. The host for the evening, Will Smith, was himself completely "slimed". Justin Bieber was voted as the celebrity most people wanted to see slimed and it happened on stage! The singer had buckets of slime thrown on him!

Meanwhile, Halle Berry was surprised by a child who snuck up behind her and slimed her as well!

Katy Perry and One Direction performed for the function.

A look at the most perfect "slime" moments of the Nickelodeon 2012 Kids' Choice Awards:

Must Read: 25th Nickelodeon Kid's Choice Awards: Will Smith Covers Justin Bieber in Slime! {PHOTOS}