The only new show to make it to my DVR series list is “Crazy Ex-Girlfriend,” co-created by its sensationally talented star, Rachel Bloom. Each episode is a full-on original musical that takes place mostly inside the head of its slightly demented heroine, Rebecca, a Harvard and Yale-educated lawyer who walked away from her type-A career in a New York City law firm to move to West Covina, California, where her boyfriend from summer camp lives.

It has a tremendous cast of singers and dancers, most with Broadway experience, including Donna Lynne Champlin, who plays Rebecca’s new friend, Paula, Santino Fontana (from the Broadway “Cinderella”) as a bartender who for some reason he cannot understand is drawn to Rebecca, and Vincent Rodriguez III as Josh, the object of Rebecca’s obsessional affection.

My favorite musical number so far is NSFW, the very funny “Sexy Getting Ready Song.” Here’s my runner-up, Rebecca’s boy band fantasy song, performed by four Joshes.

And here’s an Astaire-and-Rogers themed song with Fontana.

The songs are by Fountains of Wayne’s Adam Schlesinger, who created the pitch perfect title number for “That Thing You Do” and the songs for the Drew Barrymore/Hugh Grant film “Words and Music.” They are funny and smart and earwormy in the nicest possible way. It’s on the CW Monday nights at 8/7 central and you can catch up on the previous episodes on Hulu.