In order to win the lead role in the school musical (in which Timmy only agreed to be a part of because Trixie was the main female lead), Timmy wishes he had the voice of Chip Skylark. Unfortunately Timmy's voice goes to Chip, and the singer starts to lose his fame. Now Timmy must get Chip to wish his voice back (to switch back voices, the wish must be made in the voice of the godkid).
At school, Timmy and his friends are hearing Mr. Bickles talking about a school play, Timmy thinks its boring until Mr. Bickles says that Trixie is acting in the play. At home, Timmy is practicing his singing. Timmy singing is so horrible that it breaks Cosmo and Wanda's fishbowl, Timmy then watches TV, he sees Chip Skylark singing so great that it repairs Cosmo and Wanda's broken fishbowl. Timmy then wishes to have Chip Skylark's voice and ends up having a beautiful voice. Unbeknownst to Timmy, his real voice has ended up in Chip Skylark. Timmy thanks Wanda, and practices with Chip's voice by singing, fixing the fishbowl. Suddenly Timmy's parents rush into his room thinking they heard Chip Skylark, but they only see Timmy. Timmy's parents then become depressed thinking that what they heard was just Timmy. As they leave, Mrs. Turner questions why she couldn't have given birth to Chip Skylark. Later Timmy notices Chip has his voice instead of his own. At school, Mr. Bickles and Trixie cannot find any people to participate until Timmy comes and sings so great that it repairs the picture that Mr. Bickles threw, and gets to participate. He gets the lead role and then finds out the truth. Since the "Old Chip Skylark" stunk, Teeth TV wants to try and make Timmy the "New chip Skylark". Realizing this, Timmy then asks Cosmo and Wanda why Chip got his voice, saying that he only wants his voice, and not exchange them. Cosmo and Wanda say they know, but his voice had to go somewhere, and Chip Skylark was the only person who's mouth is open. Unfortunately, Timmy could not wish his voice back because Da Rules stated that vocal wishes had to be done in the voice of the godchild the godparents were assigned to. When confronted with the question of what should we do next, they turn to television where they get the answer to split up; one godparent would stay with Timmy while the other would be with Chip Skylark and listen for any cues that would lead him to Timmy Turner. Sure enough, while Chip Skylark sat gloating about his awful voice, he wished for a job and got one as a "Poorly sung pizza delivery boy". Meanwhile as an audience of hundreds shows up at the school musical, Timmy Turner is in a no win situation. If he stays where he is, he won't get this opportunity to sing alongside Trixie and if he goes out there, the "New Chip Skylark would be stuck being the old Timmy Turner". After Chip shows up, they turn to television for what should they do next and they turn to television. On stage, a Wheel Of Coincidence is shown saying the words GET CHIP SKYLARK TO SAY I WISH I HAD T_MMY TURNERS VOICE, but instead of Timmy it's Tommy.