Who's going to get slimed is as much of a question as who's going to get a prize at the Nickelodeon Kids' Choice Awards!
This year, singer Katy Perry was well and truly covered with the green stuff!
She was blasted with slime as she tried to present the favourite movie actress trophy to Miley Cyrus.
Katy's bright blue wig and flowery dress were covered, but luckily for Miley, she managed to avoid getting gunged!
Footage courtesy of Nickelodeon