Ariana Grande, Lily Allen and Coldplay were amongst a host of artists who made the final rundown
The upcoming festive collection features team-ups with Stevie Wonder, Michael Bublé and more
The singer flew in from Argentina especially
“If it doesn’t go to Number One, I believe Christmas should be cancelled, and maybe even Hanukkah"
"Your music inspires me and I am so touched that mine has done the same for you," Bublé responded
The crooner is "absolutely loving" the metallers' recent LP