Compare “Twelfth Night” with She's the Man

While She's the Man derives its love triangle and the names of its characters from Twelfth Night, it owes at least as much to the 1985 teen sex romp Just One of the Guys, which itself owed an unacknowledged debt to Shakespeare's plot. Its premise is the same — high-school girl underestimated by teacher and boyfriend transfers to a rival school and poses as a boy — and it lifts, without acknowledgement, a number of scenes: Viola almost gives away the gender-switch by admiring another girl's shoes, she narrowly escapes exposure when a group of ...