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Jessica Chastain has given us yet another reason to love her.

Who knew the Zero Dark Thirty Oscar-nominee had some vocal chops?!

She proved it last night when she made her singing debut with E! News by serenading yours truly with "Happy Birthday" on the red carpet at the Critics' Choice Movie Awards.

"I can't believe I sang to you on TV," Chastain said after the impromptu performance . "I never sing. I'm way too embarrassed to sing."

Jessica, you have nothing to be embarrassed about.

And, thank you!