Miley Cyrus Debuts Sexy Long Hair in New MAC Ad

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

Miley Cyrus' hair hasn't been this long in, well, a long time!

In this new ad for MAC, the 22-year-old singer is all kinds of sexy, what with her lengthy platinum blonde locks and bangs. (Not to mention those red lips that really pop with her sultry stare!)

The pretty pic marks Miley's second time promoting a Viva Glam lipstick for MAC Cosmetics. Before the bold red, she promoted a bubble-gum pink last October. 

PICS: Miley Cyrus Had a Wild 24 Hours on Instagram 

What's more, these lipstick shades are for a good cause. The Viva Glam campaign donates all proceeds to the MAC AIDS Fund, helping women, men and children living with and affected by HIV and AIDS.

Miley isn't just making us all want to buy lipstick though. She's also been busy getting ready to host the MTV Video Music Awards on Aug. 30, and it's already looking like the show will be on fire!

In true Miley fashion, she rocked rainbow sunglasses and a matching hair accessory to promote the awards show.

WATCH: Miley Cyrus Teases New Hosting Gig 

She's just being Miley!

Before Miley's new MAC collection launched, she sat down with ET and spoke about her outlandish Instagram habits.

"People go, 'Whoa. Do you ever wake up and think, ‘Wow, maybe I shouldn't have Instagrammed that?'" she said. "You can tell when I'm really bored, or I just woke up and I lay in bed for an hour and I'll do eight or nine posts in a row." Watch more below.:

Related Gallery