I think its a mexico song?

hi, i'm a malaysian, i watched a serial drama 4 long time ago in malaysia tv channel. its a mexico serial. every time in the beginning of the serial i heard a beautiful music. i think everybody also got heard it b4, i'm very sure about that. but i don't know the title of the song, nwdays i'm hearing the music in alarm clocks and also the beautiful things and items which we can get in the gift shop. so someone pls tell me wat song is that, plsssss.