Nick Jonas, Cutest Dinner Date Ever!!!

Nick Jonas knows how to charm ... his date and everyone else who's lookin' at this pic.

Nick took this little girl to Craig's in WeHo Saturday night, and her face says clearly what an awesome time she had.

We don't know who she is ... maybe a relative. It doesn't really matter because the shot is so awesome.

She's clutching a kid's i-Pad, which then raises the question ... did she actually take eyes off Nick while she was chowing down?!?!!