Raúl's the quiet one, José Luis the former boy band member (remember Ciao Mama?). Together these two Mexican brothers bill themselves as The River Roma, although the only rivers you'll notice will be the ones made of tears. Seriously, have your hankies ready—few duos specialise so resolutely in melodramatic ballads. But the Roma brothers also know when it's appropriate to kick up the tempo, so rest assured you're in for a varied ride.