LOL, it sounds like the music you get when you crank up a Jack-in-the-box to me, with a tone deaf nasally guy straining his voice over it in Spanish.
There is some good music out of Latin America, but for some reason the music to which most Mexicans in my exposure listen is that stuff, old fashioned and sort of childish. I don’t understand the appeal of it at all.
It all makes sense in a twisted sort of way as they play it while someone is blindly flailing away at an effigy with a club.
And here's exhibit A to back your assertion, Gael Garcia Bernal: Quiero Que Me Quieras. The singer seems to have some, ahem, metrosexual traits in spite of the appealing "scenery".