Phineas asks himself how will his teenage life be so he creates a machine to turn himself, Ferb and Isabella into teenagers. The problems start because Phineas starts to fall in love with Isabella, and Ferb discovers that this is his oportunity to get a date with Vanessa but the first is to get on well with Doofenshmirtz, meanwhile Candace and Jeremy go on a date and, together alone, left Suzy caring for Perry...who cannot do his job.
There is alot of famous songs in this episode (in the disco)
I´ll never give you up
Get on my Amigo
The "Too Young line"
Phineas: I sure that Im not going to listen again: "Aren´t you too young to"
Ferb: Oh I´m a stupid kid again
Vanessa: I still love you
Ferb: Oh, yeah!
Isabella: What are you watching
Phineas: You... because you are fabulous
Isabella: Oh... What did you say?
Evil Doofenshmirtz Incorporated
Ferb is in the last moment of his date and when he is going to recive Vanessa´s kiss he returns into a child again
- When Ferb turns into a teen he wears sunglasses and has his pant in the normal place
- In this episode the voices change
- The tilte is a homage to the song "I Feel like teen spirit"
- This is the 3rd episode in which is shown Ferb-Vanessa relationship
- Tribeca: The disco in which Candace and Jeremy dance is call like this Spanish disco
- That 70´s show: Teenage Phineas is dressed like Eric and the voices of the main characters as a teenagers are the same of the characters of this series
- The Simpsons: When Phineas turns again into a child Isabella says D'oh
- Vincent Martella as Phineas
- Ashley Tisdale as Candace
- Thomas Sangster as Ferb
- Alyson Stoner as Isabella
- Thoper Grace as Teenage Phineas
- Laura Pepon as Teenage Isabella
- Ashton Kutcher as Teenage Ferb
- Dan Povenmire as Doofenshmirtz
- Dee Bradley Baker as Perry
- Olivia Olsen as Vanessa Doofenshmirtz
- Jeff "Swampy" Marsh as Major Monogram
- Mitchel Musso as Jeremy
- Kari Wahlgren as Suzy