Chris Martin Gets Jennifer Lawrence Support at The iHeartRadio Music Festival

Las Vegas offered up throngs of fans for Chris Martin's Friday performance at the iHeartRadio music festival.

But one very special Coldplay fan watched the Sin city show from the sidelines: Martin's new lady love, Jennifer Lawrence.

Chris Martin Gets Jennifer Lawrence Support at The iHeartRadio Music Festival.

Following a few quiet date nights at Martin's Malibu home and a romantic dinner on Sept. 8, the actress stepped out to support the musician for a more public – and louder – appearance.

"She was off to the side of the stage when he performed," says a source. 

Jennifer Lawrence, who was seen backstage, showed off her midriff in a studded black crop top, matching denim bottoms and stilettos.

And Martin seemed to take notice.

"I've never seen such a well-dressed audience," he said. 

The Silver Linings Playbook star watched as Coldplay performed a 30-minute set that saw them spray star-shaped confetti over the sold out crowd.

 "After his set, she snuck back into his dressing room," the source adds. 

But prior to the performance, Lawrence was treated to a much more intimate show.

"She was watching him during his closed rehearsal and was singing along," says the source.

Love is really a beautiful thing, I am so sure Hunger Games star will reply a "BIG YES" to that.