Jennifer Lawrence Joins Chris Martin at Kings of Leon Concert! (Exclusive)

Jennifer Lawrence and Chris Martin are keeping their romance going… this time backstage at the Kings of Leon concert held at the Hollywood Bowl on Friday evening (October 3) in Hollywood.

The 37-year-old Coldplay singer was a surprise guest performer at the concert, where he sang and played piano on two songs – “Talihina Sky” and “Notion.” Check out pics of him sitting at the piano in the gallery below!

“Jen was taking photos and videos of Chris during rehearsals on her phone,” a source exclusively told JustJared.com. “They engaged playfully with each other, appearing like a couple in love. She kissed him on the lips several times.”

Jennifer previously was photographed supporting Chris backstage at the iHeartRadio Music Festival in Las Vegas last month. He was performing at the concert with Coldplay.