A soldier in the crowd was holding the sign; he and his favorite singer were both overwhelmed with emotion when the sign caught her eye, and Lambert had the sign brought up on stage so that she could show the audience.
Lambert tried to continue with the concert, but she was overwhelmed with emotion. “I can’t do it!” she says to the audience. “Sing the verse! I gotta get a drink.” The audience applauds for both Lambert and the hero who made her sign, then they mercifully take over the song for her, singing while she nods and wipes her eyes.
A fan in the audience caught the emotional moment on camera and posted the video to twitter: