Rivera, 43, died in a small plane crash, alongside six others, in Mexico last Sunday. She is expected to be buried in an invitation-only service Wednesday.
The recording artist's representatives told TMZ she left specific plans for her funeral, including that she wanted butterflies released at the end of the service.
A public memorial is to take place Tuesday.
Rivera was also a TV personality and the mother of five children. She sold 20 million albums worldwide.