Matthew Koma is standing by wife Hilary Duff after Ashley Tisdale's viral essay on her "toxic" celebrity mom group. In a Jan. 6 Instagram story, the singer and DJ slammed Tisdale's claims of being iced out of a mom group that reportedly included Duff.

Hilary Duff is making a serious comeback, and my Zillennial heart can’t take it! The Disney Channel starlet-turned-pop princess has been absolutely crushing it lately in the entertainment world, and I am so here for it.

Hilary Duff is putting that “toxic mom group” drama to bed with her latest song. Duff teased the new music in a clip on Instagram, wearing an asymmetrical mini by Ronny Kobo ($ 438 $262) as she sings to the camera. The look features semi-sheer panels and draping across her chest and waist with a twist detail up top and at the hip.

While Hilary Duff now exudes gratitude for her titular role in Disney's "Lizzie McGuire," she didn't always feel this way.