Chris Martin joins Kings of Leon for Hollywood show -- but was Jennifer Lawrence in the audience?

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Chris Martin joins Kings of Leon for Hollywood show -- but was Jennifer Lawrence in the audience?
NEW YORK, NY - NOVEMBER 20: (L-R) Elizabeth Banks, Jennifer Lawrence, and Jena Malone attend the 'Hunger Games: Catching Fire' New York Premiere at AMC Lincoln Square Theater on November 20, 2013 in New York City. (Photo by D Dipasupil/FilmMagic)
LOS ANGELES, CA- NOVEMBER 18: Actress Jennifer Lawrence arrives at the Los Angeles premiere of 'The Hunger Games: Catching Fire' at Nokia Theatre L.A. Live on November 18, 2013 in Los Angeles, California.(Photo by Jeffrey Mayer/WireImage)
PARIS, FRANCE - JULY 7: Chief Executive at Dior Sidney Toledano with Actress Jennifer Lawrence wearing Dior day 2 of Paris Haute Couture Fashion Week Autumn/Winter 2014, on July 7, 2014 in Paris, France. (Photo by Kirstin Sinclair/Getty Images)
PARIS, FRANCE - JULY 7: Actress Jennifer Lawrence wearing Dior day 2 of Paris Haute Couture Fashion Week Autumn/Winter 2014, on July 7, 2014 in Paris, France. (Photo by Kirstin Sinclair/Getty Images)
PARIS, FRANCE - JULY 07: Jennifer Lawrence attends Christian Dior show as part of Paris Fashion Week - Haute Couture Fall/Winter 2014-2015 at on July 7, 2014 in Paris, France. (Photo by Antonio de Moraes Barros Filho/WireImage)
LOS ANGELES, CA - JANUARY 18: Actresses Jennifer Lawrence (L) and Lupita Nyong'o attend the 20th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)
BEVERLY HILLS, CA - JANUARY 12: 71st ANNUAL GOLDEN GLOBE AWARDS -- Pictured: Actress Jennifer Lawrence arrives to the 71st Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 12, 2014 -- (Photo by Christopher Polk/NBC/NBC via Getty Images)
LOS ANGELES, CA - JANUARY 18: Cuba Gooding Jr. and Jennifer Lawrence (R) arrive at the 20th Annual Screen Actors Guild Awards at the Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by Dan MacMedan/WireImage)
LOS ANGELES, CA - JANUARY 18: Actress Jennifer Lawrence and Director David O. Russell arrive at the 20th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by C Flanigan/Getty Images)
LOS ANGELES, CA - JANUARY 18: Actresses Jennifer Lawrence (L) and Lupita Nyong'o attend the 20th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 18, 2014 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)
BEVERLY HILLS, CA - JANUARY 12: 71st ANNUAL GOLDEN GLOBE AWARDS -- Pictured: Actress Jennifer Lawrence arrives to the 71st Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 12, 2014 -- (Photo by Christopher Polk/NBC/NBC via Getty Images)
NEW YORK, NY - DECEMBER 08: (L-R) Actors Christian Bale, Jennifer Lawrence, Bradley Cooper and Jeremy Renner attend the 'American Hustle' cast photocall at Crosby Street Hotel on December 8, 2013 in New York City. (Photo by John Lamparski/WireImage)
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This was a starry Friday night at the Hollywood Bowl.

With a perfect, warm breeze floating through the open-air venue, Kings of Leon powered through their performance during the latest stop on their Mechanical Bull tour. Lead singer Caleb Followill's wife Lily Aldridge was among the bold-faced names in the audience, with pal Ashley Tisdale (and her new hubby, Christopher French) in tow, but perhaps the biggest star was hiding away backstage.

As the end of the night drew near, Followill promised the audience that he would sing something that hadn't been performed at any of their previous shows. It would be a challenge, he said, because they didn't have any band members that could play piano. "We've asked our friend to come help us out," he told the audience before introducing Coldplay's Chris Martin.

The crowd erupted. Martin, with a brief wave to the audience, sat himself at the keyboard and quickly launched in to "Talihina Sky" and then "Notion."

And just like that, Martin exited stage left as quickly as he arrived. Followill cracked, "We hope you enjoyed that. It cost us a lot of money."

And while this reporter soaked in the beautiful sounds of the performance, our eyes were immediately scanning the audience for a Jennifer Lawrence sighting. After all, she did travel to Las Vegas to support her new man at the iHeartRadio Music Festival just last month. Why wouldn't she make it a date night at this gorgeous (and local) Los Angeles venue?

According to Just Jared, J.Law did just that. The site reports that the Hunger Games star "playfully" engaged with her new beau during rehearsals, even recording photos and videos of his performance on her phone. An unnamed source also reportedly claims that "Martin Lawrence," as they've been dubbed, even kissed on the lips "several times" during rehearsal.

Well, ETonline was backstage before the show for an interview with show openers Young the Giant (more on that soon!) and saw no signs of J.Law. We'll take this as a valuable life lesson: one must always have eyes peeled for Jennifer Lawrence. Always!!!

Follow Sophie on Twitter: @SophieSchillaci

Watch the Lawrence's relationship timeline with Martin in the video below.

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