Can the American marketplace support two competition shows about celebrities singing pop songs while driving? We’re about to find out: THR reports that James Corden is developing a series based on his popular “Carpool Karaoke†segments on The Late Late Show, network and host to be determined. (Corden himself is expected to make “appearances.â€) The untitled show is expected to compete with Spike TV’s blatant rip-off of the same concept, Caraoke Showdown, because capitalist economies are rational and efficient.