I'm sure there are a handful of factors to the exact origins. It's possible the cartel women in Colombia wanted to one-up their Venezuelan counterparts (I've yet to meet someone from Colombia or Venezuela that hasn't said they are better than the other... kind of like siblings constantly in competition with one another). Ultimately, regardless of the exact origin, the end result is the same. In many ways it's deemed a requirement. Modern Colombian women just have greater access to cosmetic procedures due to the political/economical situation in Venezuela.