Answer: "The starlet stepped out in style at the award show; she wore neon green boots to match her gown" is a compound sentence.
Step-by-step explanation: A compound sentence is a sentence made up of two or more independent clauses. An independent clause contains both a subject and a predicate and, unlike dependent clauses, it can stand alone as a sentence. Moreover, independent clauses can be joined by means of a coordinating conjunction or a semicolon. The sentence provided is made up of two independent clauses which have been joined by a semicolon ("The starlet stepped out in style at the award show" and "she wore neon green boots to match her gown").