Though the bulk of the movie is about achieving fame and falling in love, there are some interesting human rights themes in the margins. One is about the "stolen generation" of Aboriginal children in Australia; light-skinned children were seized from their families to be raised in white schools and taught "white ways." The movie takes into account some of these racially themed tensions. Other themes include the benefits of hard work and teamwork.
An attack sequence in Vietnam includes bombs going off and bullets flying. One of the main characters is hit, but it's seen only from a distance. A little blood is shown. Two of the girls punch each other in the face in one scene; one gets a bloody lip. A gun is introduced but never fired. In a tense flashback, white officials descend upon an Aboriginal village, intending to take any light-skinned children. The girls sing in a Vietnam hospital for wounded soldiers, and viewers see missing limbs, etc. There's a news report about the assassination of Martin Luther King, Jr.
Lots of kissing, and one of the singers is especially flirty with many men, though she's never in any danger. In one scene, she's shown kissing and straddling her prone boyfriend, though they're both fully clothed. Many other romantic scenes of flirting and kissing, though there's really very little sexual innuendo, sexuality, or nudity.
"S--t" is used occasionally, as are the "N" word, "t-ts," "d--k," "ass," "crap," "hell," "damn," and "Jesus Christ" (as an exclamation). Additionally, there's some regional slang, such as "gobshite," "shite," "arse," and "rack off," plus insults like "moron" and "goat face."
Drinking, Drugs & Smoking
The main male character is seen drinking (beer and whisky) and drunk fairly often. He wakes up with a comical hangover the first time he's on screen. He gets very drunk during a card game with some soldiers, which results in his making a mistake. He also smokes cigarettes, as do many of the background characters -- which is accurate for the era.