Chris - who was arrested after allegedly attacking Rihanna last month - is believed to have proposed to the 'Umbrella' singer during their emotional reunion at P. Diddy's Miami mansion last weekend.
A source said: "They had a tearful face-to-face meeting at Diddy's, during which an emotional Chris apologised, begged for forgiveness and proposed to her on the spot.
"She was totally up front and confessed to him, 'I can't live without you.' "
After Rihanna accepted the 19-year-old star's proposal, the couple asked a minister to marry them at Diddy's $14.5 million mansion on the exclusive Star Island.
Earlier this week, it was revealed Rihanna's family were concerned about her reconciliation with Chris.
However, the 21-year-old beauty has seemingly ignored her loved ones' advice and is already planning a family with the 'Run It' singer.
The source added to America's Star magazine: "All she's ever wanted was to be with him forever. Rihanna is looking for the husband-and-two-kids deal before she turns 25. She believes in fairy tales, and she wants to live hers with Chris."
The couple are still hiding out together in Miami.
Chris' arraignment is set to take place in Los Angeles today (05.03.09).
He is alleged to have beaten and choked Rihanna until she was unconscious after the pair got into an argument in his rented silver Lamborghini car on February 8.
The Chris Brown/Rihanna alleged battery case has taken a turn for the worst, as sources are reporting that the pop princess has two "huge contusions" on her forehead as well as "a bloody lip and nose."
A law enforcement personnel added that the singer looked like she was a beaten "MMA fighter or something," when she filed her police report.
Meanwhile, Brown has been booked on a felony criminal threats charge.
This leaked picture shows the battered and bruised face of R&B singer Rihanna after her boyfriend Chris Brown allegedly beat her.
The photograph shows bruises and marks on her cheek, eyes and forehead and cuts at the side of her mouth.
American showbiz news website TMZ posted the picture last night sparking an LAPD investigation into the ‘unauthorized release of a domestic violence photograph’.
In a statement the police said: “The photograph has the appearance of one taken during an official Domestic Violence investigation. The Los Angeles Police Department takes seriously its duty to maintain the confidentiality of victims of domestic violence.
“The Department launched an immediate internal investigation and subsequently filed a personnel complaint. A violation of this type is considered serious misconduct, with penalties up to and including termination.”Singer and actor Brown, 19 (pictured below with Rihanna, 21 today) is alleged to have beaten her up after a pre-Grammy's party in Los
Sounds like that Sunday morning fight between Chris Brown and Rihanna was nastier than we thought.
According to TMZ, law enforcement officials said the singing beauty?s injuries were so severe that she had two ?huge contusions? which swelled up on both sides of her forehead.
Rihanna?s contusions ?look like an MMA fighter or something?[It] looked like she was growing devil?s horns,? according to a celebrity insider.
TMZ also reports that sources say the star suffered ?a bloody lip and nose? and may have bite wounds on one of her legs and arms.
Chris Brown has been booked on a felony criminal threats charge.