The “30 Rock” actor made the reveal during a conversation with “SNL” mastermind, Lorne Michaels, on his podcast, “Here’s The Thing.”
Referring to a cork board that shows the season’s roster of hosts, Baldwin said, “The biggest names in the business are coming here thirty-something years later to host the show. You have Ben Stiller, Melissa McCarthy ... Katy Perry's coming and Jimmy Fallon ... Jonah Hill and, I don't want to ruin any other names, [but] Bieber's confirmed, he's the music and the [host]."
The cat’s pretty firmly out of the bag for Stiller, McCarthy, Perry and Fallon, who have already hosted “SNL” this season. Hill, who was recently nominated for an Oscar, previously hosted in 2008, and Bieber was a musical guest in 2010. Neither have been officially announced by NBC.
Listen to the interview (the relevant part begins at 25 minutes) here.