Well, the mystery has begun to unravel. First, we were given stingy glimpses of the stills of the highly-anticipatedEndhiran. Right there, our imagination spread its limitless wings, encouraged by the flamboyance of the photographs. And now, it’s time to get a taste of the movie's music. Coming from A.R. Rahman, one is already set to listen to techno beats and snazzy rhythms. When the movie is titled Endhiran (which means Robot), we know there’s no room for the ordinary. Both expectations are thoroughly satisfied.
Produced by Sun Pictures, directed by Shankar, starring Rajinikanth and Aishwarya Rai Bachchan, the songs of Endhiran are released under the Think Music label.
Click here for Endhiran songs.

Needless to say, Vijay and Shreya bring soul to the composition – they always do!!!
'Irumbilae Oru Idhayam' is the next number. The lyrics are quite touching and bring out ‘the Robot with emotions’ angle. ARR has sung the song himself, and as always, arouses our emotions with finesse. You can’t miss the female voice singing 'Super Sonic Super Star' from time to time in the background. Once she even calls him 'Robotic Hypnotic Super Star!' The song has a heavy dose of quirky English lyrics and to top it all , we have a medium-pace rap from Kash 'n' Krissy that kind of grows on you.
What follows the heavily westernized number is the theme music, titled 'Chitti Dance Showcase', a very techno, speedy theme. It starts off with few lines of rap in English and quickly converts into quick-paced classical notes sung to heavy western percussion, a very interesting piece repeated a few times in the composition. The song has a heavy dose of electric drums; when the drums fall silent, they are replaced by a serene violin orchestra with a divine harmony.

While all these songs have an obvious attachment to techno beats and futuristic rhythms, the next song 'Kilimanjaro' is completely removed from these moods. Tribal beats and tribal chanting persist throughout the number without the slightest mention of Endhiran or anything robotic throughout. The lyrics are on the sensual side. The sound of the drums overpowers all other instruments in this number sung by Javed Ali and Chinmayi.
'Boom Boom Robot-da' is the last number in the album. This fully techno, upbeat number (sung by Krithi Sagathia, Swetha Mohan and Tanvi Shah, interspersed with Tamil rap from Yogi B) is a mish-mash of fast techno sounds and a moderately pacey tune. The lyrics reiterate the greatness of the robot and the unimaginable avenues it opens up for the development of humanity.
source:galatta.com