R5 (plus Ryland) moved out to California to persue their dreams, ever since they moved they all missed their good friend, Christina. When Christina over heard her parents talking about moving out to Califonia since they knew how much Christina misses R5, Ryland, and Ellington. Christina is closer to Ross so she misses Ross more. When Christina and her family moves out, she text's Riker about when she got to Cali. When Christina went to visit the Lynch's and Ellington, Ross was too busy working on Austin and Ally and rehearsing with his band, so when he got home, he didn't know who Christina was.