Jessica Simpson's Kids Sing 'Happy Birthday' in Adorable Video!

Jessica Simpson and Eric Johnson‘s kids are so cute!

The 36-year-old entertainer shared a video where Ace Knute, 4, and Maxwell Drew, 5, singing “Happy Birthday” on Ace‘s birthday, which falls on June 30.

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“…and he is 4 😢 �’�♋️ 🦀#ACEKNUTE #carpoolkaraoke,” Jessica captioned the video.

Later, Jessica posted a photo of Ace blowing out the candles on his fourth birthday cake. Check out the photo in the gallery below and watch the cute video as well!