The singer's pals Miley and Rihanna have taken on the coveted position in the past for the beauty brand, and Ariana is overjoyed to be joining the ranks, as she is most committed to benefitting the world with her collection.

"#VIVAGLAM @maccosmetics I am beyond honored and excited to be working with a brand that stands for and always has stood for EQUALITY," she writes on "My lipstick & gloss will be available in January and EVERY PENNY goes to people effected (sic) by HIV & AIDS. I have loved & supported @maccosmetics ever since I was a little girl walking through the mall and saw your first #VIVAGLAM girl in the window... I'm so honored!!!"

Ariana further emphasised in another post she is not taking any proceeds whatsoever from her appearance in the campaign, writing, "Did I mention everyyyyy. penny. goes to people affected by HIV & AIDS. @maccosmetics ? #VIVAGLAM (sic)".

MAC bosses confirmed the news on their own Instagram page, with the company revealing the new lipsticks and glosses will be available for sale in January (16).