JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news. Click here to buy your tickets now, before they sell out!
The singer and her model pal joined the dance party during Michaelsonâ€™s performance of her song "Afterlife."
Audience members shared videos on Instagram of the two as they waved their arms in the air and let loose.
Check out the clips below!
After the show, Ingrid posted a photo from her fun night with the caption, "Central Park Summerstage was amazing. Great friends. Great guests. Great audience. I'm so thankful. And hungover."