"The Tonight Show Starring Jimmy Fallon" has already announced its musical guest, U2, for its Feb. 17 premiere episode, but Fallon's first full week features no drop-off in big names from there. Lady Gaga, Justin Timberlake, Arcade Fire and Tim McGraw have been lined up as the first wave of performers for NBC's new late-night headliner.

After U2 open Fallon's run on "The Tonight Show," Lady Gaga will perform on Tuesday, Feb. 18; along with Jerry Seinfeld and Kristen Wiig.