The "Wrecking Ball" singer took to Instagram on Thursday to share the first photo from her new ad campaign with Mac Viva Glam.
In the photo, the 21-year-old former Disney star looks gorgeous rocking a long blonde wig with short bangs, dark eyebrows and a bold red lip. Cryus completes her look with an off-the-shoulder pink floral crop top and denim short shorts.
"Help to end AIDS with my new @MACcosmetics #VIVAGLAM lipstick available online in North America on 9/8," she posted with the pretty picture.
The pop star has teamed up with the cosmetics company to release her very own signature lipstick, which will be available at Mac stores nationwide September 8th. The proceeds will benefit the Mac Aids fund, which has been providing relief for people battling the disease around the world since 1994.
Miley isn't the first star to team up with the brand for their Viva Glam campaign -- Christina Aguilera, Missy Elliott, Fergie, Rihanna and Lady Gaga have all partnered with the cosmetic company before.
What do you think about Cyrus' bold makeover? Sound off below and check out the gallery above to see more of the "Can't Stop" singer's craziest TwitPics!