Let me stick my neck out.
The consensus seems like "Andangkaka..." is best of the album.
Ironically, when I listened to it and my Bull-S(BS) detector went way up to 200% and it SCREAMED COPIED!!!! After some melodystorming I was able locate the orginal tune!!
Rajasaraam pointed out that it is borrowed from IR and his vocabulary. Nope! It goes way back to 50's -- Alibaba & 40 Theives. The melody is lifted(remixed?!?!) from the cute and beautiful song "Chinnanchiru Chitte.." sung Jiki & Krishnan K C
http://www.musicindiaonline.com/l/26/s/movie_name.4166/
You can even trace the 'Andangkka..." hook to the interlude of the Chinnanchiru Chitte song :)
No wonder it sound good and catchy ;)