Either way, we're excited to see what comes of this. After all, singing + dancing + zombies = probably something akin to Michael Jackson's"Thriller"?Related: After teasing our taste buds with “Ex For A Reason” last month, Summer Walker delivered her long-awaited sophomore album,Still Over It but knowing their grandma's in on it too makes us love them even more.Related: The new challenge was kicked off by Kandi Reign, a rapper who wrote a song called "I Feel Like Demi Lovato." The tune is all about feeling completely confident and on top of the world, so it's no surprise that Reign found herself associating the sentiment with Demi, given the star'sinspiring journey