What is the hottest song in world?

There is no one definitive answer to this question, as the popularity of songs varies from region to region and over time. However, some songs that have been ranked as the hottest in the world include:

1. "Despacito" by Luis Fonsi feat. Daddy Yankee (2017)

2. "Shape of You" by Ed Sheeran (2017)

3. "One Dance" by Drake feat. Wizkid & Kyla (2016)

4. "Closer" by The Chainsmokers feat. Halsey (2016)

5. "Lean On" by Major Lazer & DJ Snake feat. MØ (2015)

6. "Can't Stop the Feeling!" by Justin Timberlake (2016)

7. "Work" by Rihanna feat. Drake (2016)

8. "Sorry" by Justin Bieber (2015)

9. "Hello" by Adele (2015)

10. "Uptown Funk" by Mark Ronson feat. Bruno Mars (2014)

These songs achieved massive popularity and were played frequently on radio stations and streamed extensively on music streaming services. However, as new songs are released and gain traction, the hottest songs can change over time.