“Mean Girls” (2024) delights in all the expected ways, and doesn’t try to reinvent the wheel. It occasionally lacks energy, and only Rapp’s solos are capable of going toe-to-toe with the Broadway cast recording, but it doesn’t disappoint as a happy median between its predecessors. Each version of Mean Girls is relevant to the time in which it came out, and this iteration delivers the same wit that fans have loved for 20 years. It’s fetch!