'Hero' hitmaker Mariah shared the photos with fans on Instagram as the family celebrated Martin Luther King Day at home.
Monroe looked adorable as she slept on Mariah's shoulder, while another photo showed Moroccan stroking Mariah's cheeks as she grabbed hold of a teddy bear.
Mariah, who is married to actor and TV host Nick Cannon, took to Twitter to write a message about MLK Day, which is a national holiday in America to celebrate the birthday of civil rights activist Martin Luther King Jr.
She said: "Thank you Dr. Martin Luther King for moving mountains and changing our world."
Mariah showed off her natural beauty in the make-up free photos, but the superstar upped the glamour over the weekend as she attended the 20th Annual Screen Actors Guild Awards in Los Angeles with husband Nick.
The couple looked loved-up as they posed on the red carpet, and Nick was full of compliments for his wife.
He wrote on Instagram: "#SheFineAsHell #MyWifeIsFlyerThanYours #StillCantBelieveShesMine #MariahThinksImCute."
The power couple, who tied the knot in the Bahamas in 2008, renew their wedding vows each year.
Speaking about their marriage, Nick revealed in February's issue of Ebony: "It was early on when I found out how spiritual she was, and we had conversations about kids and how to live life.
"For her to share these values, it instantly let me know this is the person I've always wanted." Aww, how sweet!
Check out more stars who have renewed their vows in the gallery below:
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