It took me quite some time to figure out that Angela Lansbury, who looked remarkably young at 35, was portraying Elvis’s mother – he himself being only 25. It's a film that takes considerable liberties with reality within an otherwise noticeably artificial romantic comedy, and it doesn't really benefit anyone involved. Having recently come back from Germany, “Chad” finds himself unsure of his next move. He has no interest in participating in the family’s fruit business; he would rather work alongside his girlfriend "Maile" (Joan Blackman), which understandably upsets his mother. Sorry, Mom. "Maile" works as a tour guide, showcasing Hawaii's scenic beauty. It is then that he meets “Ellie” (Jenny Maxwell), a young teenager who becomes quite taken with him, leading to all sorts of trouble for everyone involved—her teacher "Abigail" (Nancy Walters)—and even some physical altercations with nearly the whole island! He’s certainly someone you can find appealing to watch but lacks acting skill. His performances of “Blue Hawaii” and “Can't Help Falling in Love” make it obvious that he struggles with lip-syncing. Lansbury seems to be enjoying herself, adopting a high-pitched accent, but the rest feels stiff and unrealistic; I even suspect some of the background photography was simply repeating, something even I could tell when observing the unchanging ukulele chords being played. It appears the star’s schedule didn't permit Norman Taurog to put much effort into refining what is essentially just a pleasant film designed to showcase the performer, but it's all rather typical and unexceptional work from everyone involved.

Source on TMDB