"[I brought] my dad, he's right here!" Demi confessed to ET's Cameron Mathison on the red carpet, before Eddie ran over.
"I'm very proud. Very proud and excited," Eddie said. "I'm just trying to hold back tears, but I'm doing alright."
Demi's biological dad, Patrick Lovato, died in 2013, and Demi has called Eddie, who married her mom in 1995, "the greatest dad a girl could ever hope for."
It's a big night for the Lovato family, as Demi is nominated for her first GRAMMY for Best Pop Vocal Album for Confident.
"I feel amazing. I feel really excited," the 24-year-old singer revealed before geeking out over the performance she'll be doing during the show. "I'm here to pay tribute to the Bee Gees, and I'm singing 'Stayin' Alive,' so that'll be really exciting!"