Anirudh Ravichander has featured in quite a few promo video songs from his films, like 'Sirikkadhey' from Remo, and 'Iraiva' from Velaikkaran.

Now, as the second single, Gaali Vaaluga, from Pawan Kalyan's Agnyaathavaasi is gearing up for release on December 12, we hear from our close sources, that this song's online video promo version will feature Anirudh in it. Apparently, it is said that Anirudh, along with his band, shot for that song in Prasad Studios, recently.
 

Agnyaathavaasi's production company, Haarika & Hassine Creations tweeted, that there is something exciting that is coming up along with the single. "Something more than exciting is coming up along with #GaaliVaaluga single in 3 days! An @anirudhofficial Musical & a Trivikram’s Celluloid! Keep watching this space.  #Agnyaathavaasi #PSPK25 @pawankalyan @pkcreativeworks @keerthyofficial @itsanuemmanuel @adityamusic".
 

Going by this tweet, we suppose, that surprise could be the promo video of Gaali Vaaluga featuring Anirudh Ravichander and his band. However, let's wait for the official confirmation.