Blake Shelton and Miranda Lambert Tweet at Each Other Days After Divorce

Earlier this week, the couple ended their four year marriage.

Shelton tweeted to his now ex-wife, Lambert, on today, saying, "Hey @mirandalambert can u believe there's people who haven't bought @ashleymonroe new album? Isn't that shocking?!!"

Lambert replied, "@blakeshelton no I can't because it is the best work she has ever done! I love it! We love you @ashleymonroe."

Shelton wrote back, "Yes we do!"

Lambert co-wrote the last song on "The Blade," "I'm Good at Leavin'," and also sings backup on the title track. Earlier this week, she joined her on-stage in Nashville, too.

Meanwhile, Shelton and Monroe recently scored a #1 hit with their collaboration "Lonely Tonight."

Afterward, the two joked around about a photo of Shelton pushing a carriage.

On Monday, Shelton and Lambert announced that they were ending their four-year marriage.

"This is not the future we envisioned," their representatives said in a statement. "And it is with heavy hearts that we move forward separately. We are real people, with real lives, with real families, friends and colleagues. Therefore, we kindly ask for privacy and compassion concerning this very personal matter."