What’s the ‘Taylor Swift Challenge’?

The “Taylor Swift challenge” is sweeping social media. To get in shape for her international tour, Swift says she runs on a treadmill, singing her entire performance out loud. That means the pop star sings 44 songs in total while running. Now, fans are running on the treadmill singing Swift’s hits. Ultra marathoner Zoe Rom sang all 44 songs while running on the treadmill. Inside Edition’s Ann Mercogliano took on the challenge.