The crowd wasn't happy about the small glimpse they got of the star and booed her as she quickly disappeared.
On the show, the 24-year-old chatted with Letterman about getting a colonoscopy, possibly being a hypochondriac and her terrible singing skills.
"I do not like singing in front of other people, that's like my biggest fear," Lawrence said. "I cried on set that day [when I had to sing]. I'm scarred from my childhood."
The actress, who plays Katniss Everdeen (and sings!) in the four-film franchise, is traveling the world ahead of the third film's Nov. 21 opening. She had to dash away after her Letterman appearance, presumably to wake up for an early Thursday appearance on "Good Morning America;" however, she tried to make amends after the show by stopping to sign autographs for for the waiting throng.
Lawrence greeted a few fans then moved away, but when she came back to sign some more paraphernalia, the excited fans surged, the barricade toppled and her security detail sprung into action to whisk the star into her waiting car.
Even Katniss couldn't have moved so quickly.
No doubt that interest in the lovable goofball is high, but she recently reminded people that she still has a problem with her heightened fame.
"For each 'everyday' photo published [of me], I generally spent three hours playing cat and mouse with photographers," she told Madame Figaro (via People).
"I always had a very clear idea of the type of course I wanted – acting, that's all. Of course, by contract, I must assure a media presence to promote my work," she added. "But if I had a choice, you you wouldn't hear me express myself except in movies."
And we wouldn't have all those late-night overshare moments to appreciate...