The 24-year-old 'Hunger Games' star watched the Coldplay frontman perform two songs at the gig, held at the Hollywood Bowl in California, as he supported the rockband at the Budweiser Made In America Festival, reported Contactmusic.
"Jen was taking photos and videos of Chris during rehearsals on her phone. They engaged playfully with each other, appearing like a couple in love. She kissed him on the lips," a source said.
This isn't the first time Jennifer has supported the singer as she was spotted watching the hunk at the iHeartRadio Music Festival in Las Vegas last month.