Cannon, 34, and the 44-year-old singer separated in 2014 after six years of marriage, reported Us magazine.
The 'America's Got Talent' host apparently 'flipped out', when one of Carey's songs played at Chris Paul's LA charity bowling tournament at AMF Bowl-o-Drome on January 8.
"Nick looked irritated, he was cringing. Nick had a publicist go over to the DJ and demand he stop playing Mariah's tracks," a source said.
The duo has four-year-old twins Moroccan and Monroe.