Even though Justin Bieber is a gifted singer, taking care of his younger brother can be a challenge for him. Nevertheless, he and his girlfriend Selena Gomez still manage to have a good time with his little sibling. Recently, they had a fun day at the beach playing games with two-year-old Jaxson. Selena rocked a cute yellow dress and denim jacket, while Justin sported a matching T-shirt. However, Justin got so into the game that his pants ended up falling down. Despite their best efforts, looking after a child proved to be quite tiring for the couple as they appeared worn out and disheveled the next day.