LOS ANGELES -- It's the American Music Awards, but guests had Paris on their minds.

Celine Dion performed the French classic made famous by Edith Piaf, "L'Hymne a L'Amour," in front of a string section and a montage of images of famous Paris sites. She raised her hand triumphantly in the air at the song's conclusion, a photo of the Eiffel Tower behind her.

In introducing the songstress, Jared Leto said the terrorist attacks in Paris and Mali this month have "changed the world forever" and scarred its population.

"Tonight we honour the victims of the unimaginable violence that has taken place in Paris and around the world," Leto said. "The entire world matters, and peace is possible."

Charlie Puth, who locked lips with Meghan Trainor for an extended kiss onstage, said he happened to be near the site of the Paris attacks a few weeks before they happened and felt his heart break at the news.

"I want to write a song for Paris," said the 23-year-old entertainer, whose song "See You Again" was nominated twice at the AMAs. "I don't want to write another 'See You Again' for Paris, but I want to write a song specifically for Paris."

The lead singer of 5 Seconds of Summer, which performed during the show, said the band wants to help its fans make sense of the most recent terrorist attacks.

"This is the first time any of them have experienced a tragedy like this, so it's important for a band like us to articulate ourselves properly so they understand what's happening," singer Luke Hemmings said. "What we sing about is important, and it will change what we write about in the future. We have a young fan base, and were almost the communicators of what's going on in the world."