Like I said. Macarena is a straight forward song that came out of the height of that dumb "everyone pretending to be Hispanic/Latino" phase in the 90's when the "everyone pretend to be what we get out of African American Culture from gangsta rap and our misconstrued interpretation of Chris Rock comedy routines" fad died out. The song actually existed long before that.
As with Gangam... well, let's put it this way. Earlier in the year, it was funny because it was a meme. Now it's several months later, and old people who barely understand the internet who don't understand how internet humor works call their kids/grandkids into the room saying "Hey! It's that Gundam Guy you like!" with all the timeliness of getting a t-shirt of a Boy Band 4 years after you stopped liking them because they remember you liked it that one time. Personally, I love the song mainly as a meme, but because it doesn't take itself seriously, it IS a joke, and it's like what L(ame)MFAO would do if they were good. Of course, it's Asian humor, so mileage may vary. If nothing else, it's a novelty song that knows its a novelty song. And it kicks the crap out of whatever gunk Nikki Manaj farts out.
Really... Nikki Manaj. Songs you can't stand? How about artists you can't stand? She's like The Misfits to Lady Gaga's Jem. The nasty, worse, wanna be version of her.