The 20-year-old singer also sang her hit “Give Your Heart a Break” for the crowd. Later on, Phillip Phillips rocked out to “Home.”
“So honored to have won International Video of The Year!!! MY LOVATICS are the BEST!!! #MMVA Excited to perform soon!!” Demi tweeted during the show.
Watch Demi Lovato perform “Heart Attack” below!
Click inside to watch Demi’s second performance, plus Phillip’s performance…
WHAT DO YOU THINK of all the performances?