Mexifornian Julieta Venegas pretty much rocked her recent “MTV Unplugged” set, accompanied by our current girlcrush and impeccable bang-haver, Spanish singer La Mala Rodriguez. Watch Julieta perform “Limon y Sal” and the two duet on “Eres Para Mi.” And then try not to jump on your desk, arms flailing until the person in the cubicle next door kindly asks you to stop messing with their Beanie Baby collection, thanks.