STR to sing for his friend Dhanush?

STR to sing for his friend  Dhanush? Ajith and Vijay have been arch rivals on screen for more than decade and are good friends in real life with their mutual admiration and gifting towards each other.  But, fans continue their quest for one-upmanship for their favorite star.  In the same way Dhanush and STR, and their respective fans also have been having some frictions with one another.  But, off late at the SIIMA Awards and at Dhanush's birthday party, the two stars have been making an effort to forge a strong bond of friendship.  To take this further, there are efforts to rope in STR to sing a song for Dhanush in Mariyaan, the latter's forthcoming project with Bharat Bala and A.R.Rahman.  More reports awaited in this regard.