HAPPY BIRTHDAY TO ME (1981) 

Teen "princess" is a member of a high school clique-her fellow students fall off the perch-who is responsible ??-watch and find out

                                          Getting head

                                          Take the weight off your neck

                                          80s sat nav-basic

                     http://www.imdb.com/title/tt0082498/plotsummary?ref_=tt_ov_pl