Expatriate who left u.s. a while back
 

New popular music

How could an expatriate living outside the u.s. know what new popular music has been playing on u.s. FM radio stations like in Houston, TX? Country, hip hop, rock, latin, ect…? Would billboard be their most viable and only option at their disposal or would they have to access other online resources to determine/figure out what fm stations like in houston, tx or any other major city across america? What online resources be their best bet to figuring this out? They left the u.s. in early 2011 after retiring off to costa rica or some other third world country... how can they know what new music is continually coming out in the u.s. then?