The 43-year-old has taken the decision to go on a world tour after the success of her new single 'Beautiful', reported Us magazine.
"Due to the smash success of 'Beautiful' fans are clamouring as Mariah makes plans for a world tour," a source said.
Her new single has hit number one in 25 countries and is in the top five slots in 45 countries.
The tour would be the Carey's first global trek since 2004 when she went on Charmbracelet world tour. In 2010, she performed in the US, Egypt, Brazil and Singapore while on Angels Advocate tour.