Prom Theme Decoration

decoration
A thing that serves as an ornament
the act of decorating something (in the hope of making it more attractive)
something used to beautify
The process or art of decorating or adorning something
Ornamentation
an award for winning a championship or commemorating some other event

theme
The subject of a talk, a piece of writing, a person's thoughts, or an exhibition; a topic
provide with a particular theme or motive; "the restaurant often themes its menus"
An idea that recurs in or pervades a work of art or literature
subject: the subject matter of a conversation or discussion; "he didn't want to discuss that subject"; "it was a very sensitive topic"; "his letters were always on the theme of love"
The first major constituent of a clause, indicating the subject-matter, typically being the subject but optionally other constituents, as in “poor he is not.”
a unifying idea that is a recurrent element in literary or artistic work; "it was the usual `boy gets girl' theme"

prom
In the United States and Canada, a prom, short for promenade, is a formal (black tie) dance, or gathering of high school students. It is typically held near the end of junior and/or senior year. It figures greatly in popular culture and is a major event among high school students.
A formal dance, esp. one held by a class in high school or college at the end of a year
promenade: a formal ball held for a school class toward the end of the academic year
Prom is the second solo album by Amy Ray of Indigo Girls, released in 2005 on her Daemon Records label.