The youngest core member of the "Alaskan Bush People" family just hit a huge milestone by officially becoming an adult. Rainy Brown turned 18 years old on Monday and was showered with love on social media after her brothers, Bear Brown and Gabriel Brown, delivered a special surprise to the young reality star. The celebration for Rainy comes weeks after the family's devastating loss, when a raging wildfire tragically destroyed their rural homestead, as well as ripping through their surrounding community and causing unimaginable devastation.