Conan did a sketch around Comic-Con, with pretend audition tapes for playing Wolverine after Hugh Jackman steps down from the role.

The joke is that Kristen has mistaken it for a Ghostbusters audition and walks in already covered in green slime.

It's not a YouTube vid, so am linking direct to the article I found it on.
http://mashable.com/2015/07/09/conan-wolverine-auditions/

Relevant part is at 2:10 if you want to skip.

I can't see video