Rihanna is probably not the type to get green with envy, but she is the type to get in on a new hair trend. Today (Aug. 4), the "Stay" singer unveiled her new advertisement for her MAC Viva Glam line, and she's embracing the limey, slimey side of life with neon green hair!

"Check out my new @MACcosmetics #VivaGlam ad. All sales go to people affected by HIV/AIDS. Comin @ ya this September!!" Rihanna tweeted to her 36.6 million followers, accompanied by an image so green and sexy, it'd make Kermit the Frog feel a little bit better about his life situation.

Alongside her bright green locks, Rih Rih is also rocking a neon lime green crop top and matching skirt, somehow recalling the '50s while also jetting straight into the future.

Check out the MAC ad below:

The new green 'do isn't the only thing Rihanna premiered on her Twitter today, she also revealed that she will be releasing a new MAC lipstick this September in a separate post. In her lone makeup featuring teaser, Rihanna unveiled a bronze, shimmer shade of lipstick and lip gloss, which will be available just in time for the fall.

The proceeds from Rihanna's MAC Viva Glam line will go to those affected by HIV and AIDS, as always.

Why not go green for charity money?

And speaking of green, Rihanna isn't the only mega popstar to rock the unusual hair color recently. Her old pal Katy Perry is also rocking slime-influenced hair these days, and Rising Star expert/walking rainbow Kesha also recently dyed her hair green.

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