The POPSUGAR Twinning app, which matches users' selfies with their celebrity lookalikes, gained widespread popularity after Ellen DeGeneres featured it on her talk show and social media. The app uses Clarifai's pre-built celebrity model, allowing developers to launch it quickly without extensive resources. This model facilitates easy implementation through API calls and is regularly updated and maintained. While virality is unpredictable, having scalable infrastructure is crucial for handling sudden spikes in usage, often necessitating third-party providers like AWS for reliable uptime and maintenance. POPSUGAR benefited from Clarifai's support, which allowed them to rapidly scale without server issues, demonstrating the advantages of using external services for app development.