It's hard to top Mariah Carey and Nick Cannon's fifth anniversary — their Cinderella and Prince Charming vow renewal at Disneyland — but the love still flowed for number six.

Yesterday at the Carey-Cannon home, the pair celebrated "4/30," which not only marked another year of marriage, but was also the third birthday of their twins, Monroe and Moroccan. The songstress — whose new album, "Me. I Am Mariah…The Elusive Chanteuse," will be out May 27 — shared some photos from the merriment, which included cake… and new cars.

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Let's start with dessert first. Mariah, 45, posted this shot of a sweet snuggle with Nick. He's giving her a kiss as she smiles and holds a teddy bear. In front of them is a cake decorated with a photo of them dancing:

However, it seems that the celebrations were more about Dem Babies, who are now more like Dem Toddlers. Roe and Roc were all dressed up for the occasion — she had on a white dress with a boa and lace gloves, while he had a black hat, leather jacket, and Converse, paired with jeans. There were bunches of pink and blue balloons behind them as they posed with their famous parents.

And those new cars? They were for the kiddos. Moroccan was behind the wheel of a black mini Mercedes Benz, which retails for $399.99 at FAO Schwarz, and Monroe rocked a tiara in the driver seat of her red Mini Cooper.

"They grow up so fast! They already driving!!!" wrote Nick, who also shared a photo of Roe after having her face painted.

No word on whether Mariah and Nick, 33, exchanged vows on their big day like they have in years past, which included their Disney adventure last year and a ceremony atop the Eiffel Tower the year before that. (Their reps have not yet responded to our inquires.) Regardless, the day was a smash hit.

"4/30 was amazing!" Nick wrote on Instagram. "Happy Birthday to my greatest blessings in the world and Happy Anniversary [to] the beautiful woman who gave them to me! #Family #Love."