YouTube Fitness Challenge: Mario and Maria Make Oatmeal and Do Sit-Ups

All this month, "Extra" is teaming with some of YouTube’s biggest stars for a whole bunch of challenges, including Thursday’s “Blogilates” battle between hosts Mario Lopez and Maria Menounos. This round, the hosts had to do sit-ups while making oatmeal.

Who better to serve as mentor and judge than fitness instructor Cassie Ho?! She’s an internet sensation with 750,000 subscribers to her YouTube channel.

Watch the video to find out who won!