The 'We Can't Stop' singer has teamed up with the cosmetic company to bring out her own branded lipstick in early 2015.
"Going #VIVAGLAM with @MACcosmetics. Look for my lipstick in early 2015 ... Every dollar from the sales of my #VIVAGLAM will go to @MACAIDSFund to help those affected by HIV! (sic)," she posted in Twitter.
The MAC AIDS Fund's mission statement is "to serve people of all ages, races and sexes affected by HIV/AIDS. We fund bold, visionary and brave trailblazers determined to end the epidemic".