Alejandro Fernández is the quintessential Latin lover—something more than conveyed by his enrapturing tenor. But when the cameras are rolling, the chivalrous crooner can switch from the sad, puppy-eyed loner of “Me Dedique a Perderte” to the sultry caballero in “Hoy Tengo Ganas de Tí,” with captivating results. But the real swooning happens when he's clad in charro gear, ready to howl.