Powell also shared how grateful he was to be celebrating his birthday with Irwin. "Twenty years old will definitely be the most difficult age for me to get used to thus far," he captioned a photo of himself and his 18-year-old girlfriend
. "I couldn't have asked for a better way to spend it than living in the middle of nowhere for a few days with my girl @bindisueirwin. She sure knows how to give me an amazing birthday."