With all this talk of Miranda Lambert duets -- like her upcoming "Something Bad" with Carrie Underwood and her recent single "We Were Us" with Keith Urban -- I can't help but think of my very favorite one. And it's one you might not have heard of yet.

It's "Old Habits," a duet with Justin Moore from his Off the Beaten Path album released late last year. And the last time I talked to Moore and raved about this particular song, he told me it was one of his favorites, too.

"When I heard the work tape of it, my producer and I both looked at each other and said, 'That's a duet,'" Moore told me.

And the next thing they said to each other?

"'We gotta get Miranda,'" Moore recalled.

Moore said Lambert was the obvious choice for the song because of her vocals and how country the song is.

"There are a lot of talented female artists in this town, but nobody's a better country singer than Miranda Lambert, in my opinion," he said. "And there's not a more country song out there than this one.

"She knocked it out of the park. I knew she would. It was cool of her to take time out of her schedule to do that," Moore added. "You really find out who our friends are when you call them and say, 'Sing this song with me,' and they just go, 'All right.'"

Moore is nominated for an ACM Award for new artist of the year, and Lambert is nominated for five ACM Awards, including entertainer of the year.