Jana Kramer Posts Father's Day Tribute to Estranged Husband Mike Caussin : 'You're an Amazing Father'

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'What is perfect between us is our little girl,' the 'Circles' singer wrote.

Jana Kramer still has nice things to say about her ex -- at least on Father's Day!

Despite splitting with Mike Caussin last August, the One Tree Hill alum wrote a sweet message to her estranged husband on Instagram over the weekend, sharing her gratitude for the part he continues to play in the life of their 1-year-old daughter, Jolie.

WATCH: Happy Father's Day to These First-Time Celebrity Dads!

"We may not have the perfect fairytale love story but what is perfect between us is our little girl," Kramer wrote, captioning a snap of Caussin with Jolie on his shoulders. "Happy Father's day to Jolie's daddy. There's one thing we can for sure always agree on... you're an amazing father and she's so lucky to have you."

NEWS: Country Star Jana Kramer Splits From Husband Mike Caussin

To see how other celebrities are paying tribute to fatherhood this weekend, check out the video below.