Gwen Stefani celebrated her youngest son's third birthday on Tuesday.
"The Voice" coach was on hand as Apollo and his classmates finger-painted, sang "Go Bananas," ate cupcakes and broke into a Captain America pinata. She later thanked a fan on Twitter for wishing her son a happy birthday.
"Thank u for this b day wish for my little boy Apollo gx," she wrote.
Stefani shares Apollo, 8-year-old son Zuma and 10-year-old son Kingston with ex-husband Gavin Rossdale.
She discussed taking her kids on tour with her over the summer on "The Ellen DeGeneres Show" in September."They had the best time," the star said. "[Zuma] walked me on and off the stage every single night ... he was so into it. It was way more incredible than I could have ever imagined."
Stefani and Rossdale split in 2015 after nearly 12 years of marriage.
"I love Blake. He is the most incredible guy. Everybody loves Blake -- there's no way around it. he's just a sparkly, happy, amazing person," she said.
"The Voice" Season 12 will air its third round of blind auditions Thursday at 8 p.m. ET on NBC.