Oh, GM! It was so cute to drop this bombshell on us. You heard about it first very early this morning, but now here it is, live and in the flesh—the Cadillac CTS Coupe. Even Bob Lutz himself was amazed that GM could keep this baby a secret, until... well, now, of course. The design for the vehicle is derived from the CTS sedan, and here's the enchanting backstory: Once the sedan was finished, the design team continued to press their luck, coming up with something so beautiful that we're not sure how GM can say no to production. Vehicle specifics were sketchy, but we did learn that the coupe can be adapted for a diesel engine.