Big Sean is addressing his ex-fiancée Naya Rivera’s death for the first time since her passing earlier this month. The "I Don't F-- With You" rapper took to social media to open up about his grief late Friday evening, calling the former “Glee” star a “hero.” Naya Rivera went missing while out on Lake Piru in Southern California with her four-year-old son. Authorities confirmed she drowned but not before she pulled her child to safety. The 33-year-old actress’ son was found alone on the boat on Wednesday, July 8. He told police that he was swimming in the lake with his mom and when he got back on the boat, he looked behind and saw her disappear into the water.