The 'Diamonds' singer has previously worked with the make-up brand to create her limited edition RiRi Hearts MAC collections, but has since taken their partnership one step further.
Speaking on Good Morning America last week, Rihanna said: "I'm now extending my role with MAC from creative partner to philanthropic partner with the Viva Glam campaign. It's an iconic campaign which has been around for a few years with them."
Following the success of Rihanna's RiRi Woo lippy (which sold out in just three hours), we're certain her Viva Glam offerings will be a huge hit too.
The lipstick will be priced at £15 while the lipglass will be £14, and both are teeth-flattering blue-toned reds with a slightly shimmery frost finish.
Speaking about her lipglass on GMA, RiRi said: "It looks like a lipgloss but it's really thick so it sits right on top of the lipstick and has a really good shimmer."
The MAC AIDS Fund has already raised $325 million since it began, and Rihanna is hoping to increase this total with her campaign.
"Our goal is to raise $40 million with the Viva Glam Rihanna campaign, and the MAC AIDS Fund will be donating a $2 million grant to UNAIDS, which is a global organisation which focuses on youth prevention of HIV and Aids, because it's the youth," she said.
"They're a little more naïve to the reality of the disease and how big it really is, how much of an epidemic it is amongst young people specifically."
Her lipstick and lipglass will be available online at maccosmetics.co.uk from 11:30 AM on 6 January, before landing in store on 13 February.
The full RRP, less VAT, from sales go towards helping women, men and children affected by HIV and AIDS.
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