IN the film industry, every one is on song. Even if it is a shaven, tattooed Aamir Khan who can't remember his phone number. Little wonder that Prasoon Joshi found himself penning poetry for all the brawn and brawl on display in Ghajini.

"It is a fast-paced thriller with a lot of action and high energy, but the songs are extremely important to the narrative, " says Joshi who has written five songs, all composed by A R Rahman, for the Khan starrer.

The film is a remake of a Tamil movie that was released three years ago, with songs written by N Muthukumar, but Joshi says the Hindi soundtrack is completely original. "I did not even listen to the Southern version as I did not want to be influenced in anyway, " says Joshi, who, however, watched bits of the film to "gather a feel of it".

A little-known fact about ad man Joshi is that he is a trained classical musician who likes to compose and sing as well, but he has given them a miss in Ghajini.

"I think it is very important for a lyricist to have a sense of music since it's then that the song shapes up wholly, " says Joshi. He has composed and sung jingles for Alpenliebe and Happy Dent, among others. "But it's not something I'd do for films, " he says.

Bollywood has heard enough complaints of Aamir Khan's interference, but Joshi thinks otherwise. "He is a very intelligent man and when he has a suggestion, it's often valid. When it is not, we argue a lot and whoever has a more powerful logic wins. So I'd say there's close understanding and mutual respect that allow us to bounce ideas off each other, " he says.

If Joshi's poetry is not enough, then may be you can watch the songs for another reason - one of them has Khan sporting six different hairstyles. Guess it's all relevant to the narrative.