Blake Shelton crooning “Old MacDonald” to Gwen Stefani’s baby son might just be the most heart-melting moment on the internet. In a touching TikTok tribute celebrating Shelton’s 30th No. 1 country hit, Stefani shared an intimate, never-before-seen clip of the country superstar sweetly serenading little Apollo—and fans couldn’t get enough. From chart-topping artist to devoted stepdad, Shelton’s transformation is as beautiful as his bond with Stefani’s boys.