By Adam S. Levy - Breaking Celebrity News Staff Writer

Robin Roberts is always calm, cool and collected, making it look easy as she keeps the fast-paced world of Good Morning America moving each day.

But the veteran broadcaster became understandably choked up Thursday, after watching the music video premiere of country singer Martina McBride's new single I'm Gonna Love You Through, an inspirational ode to cancer survivors and those who supported them through the struggle.

The video includes cameos by cancer survivors Roberts, Today Show host Hota Kotb and singer Sheryl Crow, as well as a cameo from Katie Couric, who lost a husband and sister to the disease.

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After the video aired, Roberts could not hold back her emotions, crying as her GMA peers consoled her.

"I wasn't expecting to do this ... they're actually tears of joy," said Roberts, who courageously announced her battle with breast