There's no mistaking Gentlemen Marry Brunettes for a good movie, but it's worth a quick look for the truly bizarre rendition of "Ain't Misbehavin'" that suddenly pops up at the end. Set in a jungle, with Jane Russell and Jeanne Crain stuffed into a cooking pot as natives (and Alan Young, in an ape suit) gambol around, it's a weird, nutty and simply strange three minutes of film that has more character and snap (if no more sense) than the 90 minutes that precede it. If the rest of Brunettes had been like this, it would have been more entertaining (though still not necessarily good). Unfortunately, most of Brunettes is saddled with a very routine screenplay that has a trite plot, flat and/or corny dialogue, and cardboard characters. Some of the musical numbers, though lacking the unique flavor of "Misbehavin'," are pleasant and diverting, but getting to them is a chore. It doesn't help matters that Russell is hopelessly miscast in a Marilyn Monroe-like role, or that Crain can't do a lot with a part that Russell would have done better. There's some nice scenery, some gaudy color, and some fun Billy Travilla and Christian Dior costumes, but all in all, Brunettes is a disappointment.