There are several thematic entries suggested by the title.  Each circled cell (13 in total) represents a letter from some of such entries.  Jumble these 13 letters and put them along with one other themed entry in entirety (5 letters), to derive the title of a song (4 words - 7,2,4,5), that can be loosely connected to the main title

This Brainiac puzzle was created by Sowmya Ramkumar with the grid concept by Bhalchandra Pasupathy. The clues were contributed by the following members with inputs and feedback from Bhalchandra Pasupathy.

1. Ajeesh VM
2. Aniruddh J Raman
3. Bhalchandra Pasupathy
4. Debasmita Basu
5. Dhirendra Tripathi
6. Hari Mannarsamy
7. Lakshmi Vaidyanathan
8. Manish Jhaveri
9. Manish Misra
10. Neelima Rai
11. Nemo Omen
12. Ramki Krishnan
13. Satyavrat Bondre
14. Sowmya Ramkumar
15. Srinivas Venkatesh
16. Sudarshan Jaganathan