Longtime couple Pink and Carey Hart are celebrating 12 years of marriage.

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The 38-year-old singer and 42-year-old former motocross competitor reflected on the ups and downs of their relationship in sweet posts Sunday on Instagram.

Pink shared a collage of photos of herself and Hart with her 3.5 million followers. She joked about their occasionally tense dynamic in the caption.

"12 years married today. 16 if ya count the 4 years we spent deciding if we were going to live together forever or kill each other. It's been a nice mix of that ever since. Get em' young and train em' ladies. I still have a crush on you @hartluck," the star wrote.

Hart also posted pictures with Pink on his own account. The couple share two children, 6-year-old daughter Willow Sage and 1-year-old son Jameson Moon.

"Today this beautiful woman and i celebrate 12 years being married. What a crazy ride baby!!!! Can't say there is a single person on this planet I'd rather spend my time with than you," Hart gushed.

"We have build an amazing family, and life together. Who would have thought two misfits like us could have done such a great job. I'm so proud of the person you are, and more so the mother and wife that you have become," he added.

"Like you always say 'we live in dog years,' so here is to another 84 years. I love you @pink."

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Pink last released the album Beautiful Trauma in October, and will kick off an accompanying tour March 1 in Phoenix, Ariz.

Hart praised the singer as an "amazing" mother and performer in a post in December.

"I'm proud of you baby, and congrats to #1 albums all over the world. You deserve it and have earned it. I love you. On to the world tour," he wrote.