urx unit loader 'Smash' preview: Ivy's breaking and Karen's shaking

Ivy (Megan Hilty) finally reaches her breaking point on Monday’s (March 12) episode of “Smash” and gives Derek (Jack Davenport) a verbal beat down during rehearsals, though we’re highly doubting her parting sentiment to him. Check out the clip above and then watch her lose something other than her cool — her voice — in the preview below.

Also, listen to Michael (Will Chase) essentially serenade Julia (Debra Messing) during rehearsal and Karen (Katharine McPhee) do Florence and the Machine proud with “Shake It Out.”

“Chemistry” airs Monday at 10 p.m. on NBC.