Jimmy Fallon challenged YouTube star JoJo Siwa to an 'aggressive dance-off'

There are dance-offs, and then there are "aggressive dance-offs." Jimmy Fallon challenged wildly popular 15-year-old YouTube dancer and pop star JoJo Siwa, known for her appearances on Lifetime's Dance Moms and Abby’s Ultimate Dance Competition, to one heck of a dance challenge on Monday night's show. "I don't want to know who can dance the best, I want to know who can dance the hardest," said Fallon on Monday's The Tonight Show. Yeah, with that dance-heavy resume, you're probably already thinking this sequin-clad teenager had it in the bag. She did. Read more... More about Jimmy Fallon, The Tonight Show, Jojo Siwa, Entertainment, and Movies Tv Shows