Demi Lovato to the rescue! On June 16, 2016, When a fan shared a meme on Instagram basically implying that Ariana Grande's voice didn't live up to Mariah Carey's, the "Heart Attack" singer quickly interjected. Not only did she defend young Ari, but also slammed Mariah for being not-so-nice to Jennifer Lopez over the years.

The original post showed a side-by-side photo of Mariah next to Ariana. "When you order it online vs. when it arrives," the caption read.

Demi quickly took it upon herself to comment on the photo, saying, "You got it the wrong way around honey." And, the Instagram account replied, "I really didn't mean anything negative as said in my caption."

Still, Demi felt that her business was unfinished. She went on to write, "Mariah is a legend and is so talented but constantly disses people. It's nasty the way she treats Jennifer [Lopez]. Ari did nothing wrong."

The 23-year-old, who split from Wilmer Valderama earlier in June, is referring to Mariah's longstanding, yet unconfirmed feud with J. Lo.

It all began when the "Butterfly" legend said that she didn't know Jenny from the Block back in the 2000s. Though she recently claimed that she was just being honest with the notorious "I don't know her," line. As in, she really hasn't met her? It still seems pretty unclear.

There's just been a ton of passive-aggressive back and forth between the two, so nobody really knows what's up.

In any case, it was nice of Demi to come running to back up her girls. Do you think Mariah will respond?