Josh Groban on the most metal thing he's done today ? and how Celine Dion saved him

Before he rings out the old year, let's see if Groban, 39, can sing his way out of the comedic jam known as Stupid Questions.ENTERTAINMENT WEEKLY: Harmony features you and Sara Bareilles duetting on Joni Mitchell's “Both Sides Now.” You also hosted the Tonys with her. He's an effortless and graceful dancer, and as wonderful as having Tony Danza on set is anyway, I think when you get Danza’d, it means he really likes you and he does a little step ball change around you between takes. You know, having a show that's based on a wall was probably a bad foreshadowing of things to come, and America knew better.How would you describe the sound that would occur if Josh Groban, Kesha, Ludacris, and Brad Paisley collaborated on a song?It would be the everything bagel of music. It’s just an honor to be nominated, but to be nominated in every award is its own tragic honor.There's a legendary story that David Foster discovered you when you were in high school, and your first gig was rehearsing a duet with Celine Dion at the Grammys as a fill-in for Andrea Bocelli. And I think the internet has done a lot of bad things, but one of the good things is it's given young and stupid singers far more information before having a really awkward big break.You're suddenly rehearsing with Celine Dion. What was the most awkward fan interaction you’ve ever had to wriggle out of?Well, anytime they want me to learn a secret handshake, if your fingers are double jointed, there's only so many things you can do. I sing in styles that only my own mother would say, “That was a great effort.” I do a really good country voice, but I don't have the stories to sing country music. I feel like you know all moms.My advice to anybody who's trying to win over their mom this holiday is to — I don't know what access you have to a 60-piece orchestra, but find a really nice antique U47 Telefunken microphone.