Hi, short story!
Well, as it's presently being interpreted by the industry, "chick-lit" isn't so much a GENRE of book as it is a TONE of book. A chick-lit novel is funny--mostly sarcastic funny, about regular life foibles. Quite often, the protagonist is female, in her early to mid-20's and is an urban dweller (although not always.) There previously has been a tendency toward extravagance, from the clothing (designer) to the shoes (high-priced and stiletto) to the men (lots of them!
) There are chick-lit mysteries (Lori Avocato), and romances (Katie MacAlister), and fantasy/paranormal (MaryJanice Davidson), among many others. Pretty much the only place I haven't seen chick-lit yet is in westerns and horror (but give people time!)
Early versions had fairly one-dimensional characters, but recent books have deepened the characterization and plot, while still retaining the overall humorous feel.
Does that help?