Southern comfort! Garth Brooks joins Miley Cyrus as he gives expert advice to final 12 The Voice contestants ahead of live performance 

He's outsold Elvis Presley in the U.S. and sold more than 160 million records worldwide. 

And Garth Brooks was on hand to give advice for contestants on The Voice on Monday night's show. 

The 54-year-old singer offered a little southern comfort as he made a one off appearance as a key adviser to the top 12 competitors in season 11. 

Scroll down for video 

Expert advice! Garth Brooks was on hand to give advice for contestants on The Voice on Monday night's show

They will perform live in front of coaches Adam Levine, Miley Cyrus, Blake Shelton, and Alicia Keys. 

Garth got involved during rehearsal to help them get ready for the adrenalin-filled one-shot only opportunity.

He's seen looking characteristically under-dressed, with a blue baseball hat covering his head. 

The country music star teamed blue denim jeans with a navy shirt, which was left untucked - over a grey marl Tee. 

He's a pro! Garth got involved during rehearsal to help them get ready for the adrenalin-filled one-shot only opportunity (pictured with Trisha Yearwood on November 2)

Miley looked to have taken a trip to the 60s in a flower-power inspired print dress.  

The final twelve are Brendan Fletcher, Billy Gilman, Josh Gallagher, Ali Caldwell, Darby Walker, Aaron Gibson, Christian Cuevas, Wé McDonald, Sa'Rayah, Austin Allsup, Courtney Harrell and Sundance Head. 

In a preview clip on EW Brooks if seen telling Miley's contestant Aaron Gibson, 'I’m sitting here and watching you go from fighting a song to making it yours.

'It’s going to work really well,' he added confidently.  

The top 12 will perform live in front of the coaches for America’s vote Monday, Nov. 14 at 8 p.m. ET on NBC. 

The comments below have not been moderated.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

By posting your comment you agree to our house rules.

Who is this week's top commenter? Find out now