Sonic sings gutsy 'I'm Going Down' on The Voice 2015 (VIDEO)

Sonic sang "I'm Going Down" on The Voice 2015 Season 8 Live Playoffs on Tuesday, April 7, 2015 for Team Christina Aguilera.

Download: Sonic - I'm Going Down

"You've got to find it in this window," said Adam Levine. "It's easy to get lost and you came back."

"That was such a cool journey," said Pharrell Williams. "I felt the confidence."

"I know how much you connect with that song and I felt that from you," said Christina Aguilera.

"Her attack coming back was just so powerful," said Blake Shelton.