When Zack was practising playing the guitar, he was given a chance to try on Spencer's interactive gloves which gives him a feeling of playing a guitar. Then the gloves began to go crazy, and Spencer was able to release it from Zack's clutches, and they discovered that Zack became an amazing guitar player but he can only play well in his room. When Cam sent Zack's guitar-playing video, it attracts a famous music star who is looking for a member that would replace him in his band. Zack's father gave Zack a new and better guitar while Spencer discovered that Zack was playing so well because of magnetic fields in his room. When this star arrives at Zack's house, he began treating Spencer extremely badly. Zack did not want to become a rock star but Cam kept on pushing him because of money. During the recording sessions, Zack's father came through the door, and disturbed them. Ricky Dallas (the famous star) went ballistic and told ""the old man"" to leave them alone. Daniel Greenburg told e (thetvdb.com)