Composer Shantanu Moitra and lyricist Swanand Kirkire's latest offering "3 Idiots" boasts of youthful spunk and raw energy and the duo say that they had to go back to their college days for inspiration.

"Music of '3 Idiots' is inspired by my college days. I focussed on the fact that everything might change, but youth remains youth. Youngsters and their mannerisms across most generations are quite similar. So I bore that thing in mind and made the music, " Moitra told over phone from Mumbai.

Kirkire echoed: "I was involved in the film from the scripting stage. So all the songs in the film are organically from the script, which is a campus story. The songs required me to remember my college days. What I have written is simple and without any complications."

"When you pen lyrics for any film, you have to keep in mind the colour of that particular film, style of the film, characters etc. In this film too we kept in mind the lingo used, the philosophy of the film and so on, " he added.

There are five original songs in the film, which has Aamir Khan, Sharman Joshi, R. Madhavan and Kareena Kapoor in lead roles. Of the songs, "Aal Izz Well" and "Zoobi Doobi" are chartbusters already.

Commenting upon the songs' popularity Moitra said: "As an artist, when you are appreciated you obviously feel very nice. But when you get that appreciation for a work where you worked without any restrictions or compromises, then that is even better."

And which song was the toughest to compose?

"It was a challenge composing 'Jaane nahin denge' because of its musical structure. It's high one moment then it suddenly goes low. So that was quite difficult, " said Moitra.

Produced by Vidhu Vinod Chopra and directed by Rajkumar Hirani, the film is slated to release Dec 25.