the 3 of them have very very catchy songs.
it also helps that they pretty much release an album every year
and have a new single once a month.
I gotta admit I like some songs of them and I listen to them when I have my party girl mode on but I really wouln´t pay to go see them live or actually buy any of their albums
but I honestly can´t wait for the moment when this whole "disco Lady Gaga-ish" music stops being popular, pretty much all the music is the same, they all have that "beat" :S, and everyone is going for it.
...oh well I´ve been waiting for the reggaeton music to stop being popular for the last 8 years, but it never stops