Miley Cyrus has plenty to be happy about lately.

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The singer shared her excitement on Instagram on Jan. 10 in regard to Tiffany & Co.'s first same-sex engagement ad.

She said, "Thank you Tiffany & Co for being so bad a--!!!!"

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The campaign features a real-life couple as reported by ELLE on Friday.

The ad reads as: "Will you promise to never stop completing my sentences or singing off-key, which I'm afraid you do often? And will you let today be the first sentence of one long story that never, ever ends? Will you?"

"Nowadays, the road to marriage is no longer linear, and true love can happen more than once with love stories coming in a variety of forms," said Linda Buckley, Tiffany & Co. VP of North American PR, in a statement to ELLE.

"The Tiffany engagement ring is the first sentence of the story that a couple will write together as they create a life that is deeply intimate and exceptional, which is the message we hope to convey through this campaign," she added.

Cyrus is also stoked about "bein da newest face of viva glam," which she shared on Jan. 8.

The singer revealed on Instagram her collection, which features a photo of herself with a glamorous outfit and flawless make-up along with some Miley money and of course her lip products (Lipstick and Lipgloss) that she collaborated on with MAC.

The MAC Cosmetics line with Cyrus will be available starting Jan. 22. The singer revealed, "I couldn't be a happier hippie for your generous donation to the happy hippie foundation! We don't stop at youth homelessness! Our goal is to make those even unlike ourselves HAPPY and live lives full of love! Thank you for allowing me to be apart of the army in this battle against AIDS!"

All proceeds from her Viva Glam collection go to the MAC AIDS Fund.

Tags: Miley Cyrus