IU has reached a major milestone on her YouTube channel, surpassing 10 million subscribers and earning the prestigious YouTube diamond play button. In a recent video, IU excitedly shared the moment as the subscriber count kept climbing in real-time on a tablet screen she was holding up. Celebrating the achievement with her manager, they joyously honked a car horn and applauded. IU expressed gratitude to her fans for their ongoing support and pledged to deliver engaging content. She light-heartedly thanked her fans repeatedly while updating the subscriber count live, prompting her manager's playful remark that the video wouldn't end if she kept doing so.