The names Tetsuo, Kaneda, and Akira are written in sharpie on red Solo cups at Big Mack's party. These are the names of characters from the film Akira.
During the party scene, Big Mack can be heard discussing someone named "Omar" with another party guest. This is a reference to Omar Little from The Wire, which the actors discussed while shooting most of the scene, believing their audio wouldn't be used in the film.
Jasey is seen reading the novel of "The Fault in Our Stars" in her blanket fort half way through the film. The book is written by John Green who is a well known YouTube celebrity. His face is featured on a series of shirts that provided the inspiration for Jasey's own "Adventure" shirt.