Gossip columnist Janet Charlton wrote on her Web site Thursday: "Sneaky little Mariah Carey is getting romantic with MTV's Nick Cannon and doesn't want anyone to know!"
Charlton claims the two longtime friends got much closer after she asked him to film a cameo in one of her upcoming videos.
"They started spending time together working on the video script and they got VERY close," Charlton writes. "Sparks flew and the next thing she knew, Mariah had promoted Nick from a cameo in her first video, to DIRECTOR of her second video! They were both at Butter in New York the other night but keep up the charade of 'just friends.' She's been flying around promoting her album so they secretly hook up whenever they can."
Meanwhile, WENN is reporting that Mariah caused a nasty traffic situation in London recently while there to promote her new album, " E=MC2."
Hundreds of fans turned out to catch a glimpse of the star as she arrived for a signing session at Oxford Street's Selfridges department store. But police could barely handle the huge crowds, causing officers to divert cars away from the Selfridges store because of the commotion surrounding her appearance.
After posing for waiting photographers outside the store, Carey -- who was two hours late for the appearance -- was soon ushered inside Selfridges, where two floors had been cordoned off in preparation for her arrival.