"What Jhumka" is a song that appears to be associated with the Bollywood movie "Rocky Aur Rani Kii Prem Kahaani". The song is sung by Arijit Singh and Jonita Gandhi and can be downloaded from various websites such as Pagalworld, SongsZilla, and Jayasrilanka. There is also a remix version of the song by DJ Raxit available on Gaana.