Join Mike Kear in Sydney, Australia and Caroline Wright in Kea‘au, Hawaii as they count down the 20 hottest bluegrass songs on the charts according to BluegrassToday.com.Mike and Caroline will also peek at this week's BT Grassicana and Bluegrass Gospel hits. They'll share some of this week's freshest, most exciting news from the world of bluegrass music. They’ll celebrate a few of December's Big Bluegrass Birthdays, including that of the amazing Jason Burleson from Blue Highway. And you can join them in Mike and Caroline's Big Bluegrass Time Machine -- there's plenty of room! -- to catch some spectacular live performances from the near and distant past! Come hang out with us in the BTTop20 Facebook group (https://www.facebook.com/groups/bttop20) and you’ll be the first to hear about every upcoming episode!