Luke Hemmings knew he had a little sister but she was taken when he was only 5. 14 years later and he wants answers as to what happened to her. Who is this mysterious person, could it be her? Read on to find out. Xxx

¨Thalia, this is who you will be babysitting!¨ ¨Huh? I'm babysitting 5 Seconds of Summer?!?¨