There's still a week until
The guests for the show's Feb. 17 launch are to Will Smith and U2.
But fans are expected to be tuning in Friday, Feb. 21 to check out Timberlake, who appeared on Fallon's "Late Night" 12 times over five years and was the musical guest when Fallon hosted
Other scheduled first-week guests include
This will be the first time since 1972 that "The Tonight Show" has been hosted from