Jennifer Lawrence Joins Chris Martin Backstage at iHeartRadio Music Festival 2014! (Photos)

Jennifer Lawrence shows off her midriff in a crop top while walking around backstage at the 2014 iHeartRadio Music Festival on Friday evening (September 19) at the MGM Grand Garden Arena in Las Vegas.

The 24-year-old actress was in attendance to support her new boyfriend Chris Martin, who is at the festival performing with his band Coldplay.

This is the second time this week that Jennifer is supporting her new man. She reportedly sang along to every word at Chris‘ concert at the Ace Hotel Theatre in Los Angeles this past Wednesday.

“She knew every word to every song and there was a glisten in her eye as she watched Chris perform,” a source told E! News. “She couldn’t take her eyes off him.”

FYI: Jennifer is wearing an Emilio Pucci top and pants.

10+ pictures inside of Jennifer Lawrence and Chris Martin backstage…