Kalakku Machaan
Singer: Anirudh Ravichander
Lyrics: Rokesh

Kalakku Machaan was the first released song of STR's music-making career, and it features as vocalist one of the top music directors of Tamil cinema, Anirudh. A song aimed at entertaining the masses, Kalakku Machaan works as a good intro song not just for Santhanam, but also for STR.

Kadhal Devathai 
Singer: Yuvan Shankar Raja
Lyrics: Vairamuthu

Kadhal Devathai is the other song from STR's debut album that we got to listen a good while ago. Yuvan Shankar Raja, another musical giant in the industry, sings to lyrics by Vairamuthu which are.. surprisingly Tanglish and quirky for the master songwriter. The song is interesting, but might be a tad too long, given its party number feel.
 

Unakkaga  
Singers: Leon James, Dr. Burn, Andrea Jeremiah
Lyrics: Dr. Burn, Vignesh ShivN
 

Unakkaga starts off fresh, and thanks to the vocals of Leon James and Dr. Burn, as well as a saxophone piece, remains fresh and power-packed throughout. For one, it makes us doubt whether this is the first album of the star actor, as the energy throughout this song is well maintained.
 

Siru Siru
Singers: Keerthana Vaidyanathan, Vasudev Krishna
Lyrics: Karunakaran
 

Siru Siru's fusion of Carnatic tunes and string harmonies reminds of few classic hits but is unique and impactful in its own right. Love and other emotions flow high, and it seems like the song will mark an important point in the film. Unexpected, but a pleasant surprisingly mature and intense number!

Vaa Munimma
Singers: Usha Rajendar, T. Rajendar
Lyrics: Madhan Karky
 

You'll start off partying and dancing to Vaa Munimma's house music and suddenly find yourself kuthu-dancing in the middle. The EDM sounds dominate the song and TR has been used well by his talented son.