The movie is about a middle school girl who broke up with her boyfriend after the opening scene (they were still together in the opening scene).  I believe she goes to a new school and at some point dyes her hair white after viewing an ad for Nicki Minaj hair dye (I think she thought it was blonde hair dye and wanted to be seen as more attractive. Her hair later reverts back to its natural color). Later on she encounters a boy with whom she plays shadow puppets with.

I watched it in either 2009 or 2010 in my classroom (definitely a movie), and I think it came out around when Nicki Minaj was becoming popular (hence the hair dye ad). It was in also in English and in color.