Mariah Carey joined the coaches as an advisor on last night's episode of The Voice.

It was the first night of Knockouts, that's when the coaches pair their artists to perform solo, then select just one of them to move on to the Playoffs.

Team Adam's RADHA performed a Mariah Carey song, right in front of her OMG!

Check out Team Kelly's Kymberli Joye's version of The Middle! She's the internet's pick to win this season.

WoW! Team Adam's Reagan Strange is only 14 years old!

Watch, Listen, and Win with the Hoosier Lottery!

The Voice is back on NBC for it's 15th season, and to celebrate the Hoosier Lottery has introduced their all-new The Voice scratch-off game featuring the chance to win $100,000 instantly! What could be better than that? How about the opportunity to get your hands on $25 worth of those scratch-offs absolutely free!

Watch The Voice every Monday night on NBC at 7:00 p.m Central (8:00 p.m. Eastern), and pay close attention to what goes on. Then, tune into The Rob's Rob's Radio Show with Madie West Tuesday morning at for the chance to answer a question about the show. Answer correctly, and we'll hook you up with $25 worth of the The Voice scratch-off game for free!

Plus, you and a guest will be invited to our season finale viewing party!

The Hoosier Lottery reminds you to please play responsibly. Must be 18 to or older to play.