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Reuben Cannon, Mariah Carey

Malcolm Ali/Getty Images, Johnny Nunez/Getty Images

Mariah Carey is keeping it all in the family.

E! News has learned the R&B diva is lending her pipes to promote the new album from Reuben Cannon, aka the younger brother of Mr. Mariah, Nick Cannon.

“Reuben and Mariah are doing a duet together for Reuben's first album,” an industry source tells us. “They are meeting at the end of the month with Mariah's record label, Universal Music Group, to seal the deal, and Reuben is thrilled.”

Reuben Cannon was recently signed with Lavert Entertainment and is halfway through recording his album, slated for release later this year.

There was no comment on the collaboration from the Carey and Cannon camps, but a Reuben rep wasn't beyond teasing, saying, "Reuben Cannon is working on some really amazing things right now."