It's no secret that Leighton Meester has pipes that we could listen to non-stop for days. When she was our cover star back in November 2014, Meester had just released her debut album Heartstrings and gotten married to actor Adam Brody. Now, she has a baby girl named Arlo Day! Between balancing all of those things in her life, the singer-songwriter/actress managed to find time to do a cover of Elvis Presley’s holiday classic "Blue Christmas" with her best friend Dana Williams. Their version is more of a folky duet, but we're totally feeling it. Let the ladies serenade you in the video, above.