Do not get between Kristin Chenoweth (April) and her Starbucks coffee! The Glee guest star, who hopefully will appear on the show again in Season 2, took to The Late Show with David Letterman last night and recalled a story about a rude barista that she ran into at Starbucks.

Saying she's been to every Starbucks in New York, Kristin said she took to Twitter after the incident. "So I tw*tted. I mean twitted about (laughter)," the star mistakenly uttered. "I knew that was gonna happen. I knew, I knew I was gonna say that!"

Composure regained, Kristin said that she "twitted" about the rude employee and then got a response from the Starbucks manager in Missouri. Yikes! Whether or not the employee got the axe we don't know, but one thing is clear: Don't mess with Kristin!