Carnival spokesman Robert Slight told how they had contacted a number of celebrities - including Britney Spears, Rod Stewart and Jessie J - but most replied back to say they were not available.

BBC: Beyonce

Other women on our list, including Rhianna, Britney Spears and Katy Perry, also ranked in the top tier of social influencers.

FORBES: How Influential Are Hollywood's Highest Paid Women?

Obama's big margin held among African-American women as well as men including women such as Shirley Spears of Union, S.C.

NPR: What Obama's Win Means for Super Tuesday