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50 Cent makes no effort to sustain his tough guy façade in the presence of the great Oprah Winfrey, as evidenced by his sit down airing this Sunday on OWN. The two squashed their alleged beef for a heart-warming interview in which the rapper dishes on the woman he loves most —his grandmother— and the lengths he goes to to make her happy.

PHOTO: 50 Cent in Hospital with Stuffed Animals

"I used to sit there and rub on her feet and even paint on her toenails," he reveals to an amazed Oprah. "I'd do that for her 'cause her feet swell up."

Fiddy even goes as far as to brag about his skills, perfected by years of practice.

"I can paint a toenail, like we in a nail shop," he says, beaming with pride.

VIDEO: Pauly D Starstruck Over 50 Cent

The 36-year-old rapper, born Curtis Jackson, was raised and legally adopted by his grandma after his mother was murdered at 27.

You can watch more of 50 Cent's interview on the next edition of Oprah's Next Chapter, also featuring Michael Jackson's daughter, Paris Jackson, this Sunday at 9 p.m. on OWN.