The 44-year-old The Masked Singer judge and his 11-year-old son adorably posed for photos at the event's red carpet on Thursday, May 27, where both were wearing fashionable suits.
A pic, seen below, shows Robin with a pink leopard-print shirt peeking through his jacket, while Julian is rocking an eye-popping red outfit with a white shirt and black slippers.
The "Blurred Lines" singer is currently engaged to model April Love Geary. The pair welcomed their third child together, son Luca Patrick, on Dec. 11, 2020, and two days later, Robin took to Instagram to pay tribute to late father Alan Thicke on the fourth anniversary of his death.
"Four years ago today, on December 13, 2016, my beloved Father passed away," Robin wrote to accompany a photo of himself in bed with his newborn son.
The star continued in the caption at the time, "As I wake up next to this little guy [sic] his first night home, I miss my father so much, but I feel his love in my heart every time I kiss my babies on the head the same way he would kiss me."
The 2021 iHeartRadio Music Awards have proven to be quite a memorable night. In fact, host and performer Usher revealed on the red carpet that he and girlfriend Jenn Goicoechea are expecting their second child together.
To check out the full list of winners from the 2021 iHeartRadio Music Awards, click here.