Adam Levine can't wait for Pharrell Williams to join 'The Voice' USA.

The Maroon 5 frontman thinks the 'Happy' hitmaker, who recently confirmed he would be replacing CeeLo Green on the NBC series next season, will be a great addition to the judging panel.

The 35-year-old singer told The Hollywood Reporter: ''I think he'll be a great coach. It's a different experience, so he has to get ready for the roller coaster.''

The 'Love Somebody' hitmaker added: ''He's so lovely -- an unbelievable talent actually.''

Asked if she had any advice for the seven-time Grammy Award-winner, Shakira, who has a rotating spot on the show with Christina Aguilera, said: ''Fasten your seat belt, it's going to get wild. He's going to do a great job; he's a very smart guy.''

But country singer Blake Shelton, 37, warned Pharrell to start preparing for battle.

He said: ''The gloves have got to come off -- he's got to get mad, gotta get competitive and starting thinking about music like it's a sport.''

'Forget You' singer CeeLo, 39, announced last month that he wouldn't be returning to the show again, as he is developing his own TV show.

He said: ''I'm not coming back guys. I'm going to continue my relationship with NBC. I have a television show development deal with them as well and hopefully some other talk show opportunities for later in the year.

''But yeah, I'm going to miss 'The Voice' too. So I'm not coming back guys.''