Scientists studying postings on Twitter have put together a list of least easy-going celebrities on the popular microblogging website.
According to the study headed by Australian lager company Foster's, rapper P Diddy was the least positive star as per a scientific formula.
London mayor Boris Johnson came in second, followed by pop princess Britney Spears, reports The Telegraph.
Singer Lily Allen grabbed the fourth spot, and wrapping up the top five was 2006 Celebrity Big Brother's Chantelle Houghton.
Least easy-going celebrities on June 30:
1. P Diddy
2. Boris Johnson
3. Britney Spears
4. Lily Allen
5. Chantelle Houghton
6. The Streets (Mike Skinner)
7. Mariah Carey
8. Justin Timberlake
9. Peter Andre
10. Katie Price