The video tells the story of a young couple—played by Friday Night Lights actress Aimee Teegarden and 90210 star Dustin Milligan—who fall in love after meeting at a carnival.
Demi, who codirected the video with Ryan Pallotta, sings the soundtrack to the pair's love story as viewers watch the duo share intimate moments and sweet kisses in the sun.
The lovebirds are torn apart after the young man is shipped off to fulfill his duties in war, and the pair passionately write letters to each other while yearning to be together as memories of the twosome's tender romance flash across the screen.
And just when fans think the fairy-tale romance might not come to a happy ending, the couple is reunited, sharing a warmhearted and loving embrace (so sweet!).
Demi is clearly proud of her most recent project, and the brunette beauty took to Twitter after the video's release to thank her fans for their support.
"I'm SO happy you guys love my video!!!! This was such an incredible experience co-directing.. Glad you guys are happy with it!!!" she gushed this morning before sharing the important significance of the song.
"I dedicate my video to all of the troops, anyone who has passed away overseas and to this INCREDIBLE country that I'm so thankful 4," the former Disney darling wrote.
That same month, the singer also opened up about her fourth album, revealing the project features many deeply personal tracks.
"With the album I have a ton of upbeat songs, that are just like 'Heart Attack,'" she said. "Super catchy, they get stuck in your head, which is always a good thing. But I also have some pretty emotional songs opening up about things that I haven't really ever talked about. It's a big deal for me."
What do you think of Demi's new music video? Tell us in the comments!