Jimmy Fallon came for Leno's No. 1 spot. And last night (Feb. 17), the SNL alum debuted as host of The Tonight Show. Spike Lee directed the show's intro. Fallon brought out a gazillion guests (including Lady Gaga and Lindsay Lohan). U2 performed. And Fallon did an Evolution of Dance skit with Will Smith, featuring The Carlton. Also, The Roots! Was it a hit? Ratings were strong. But check out what the people had to say about the premiere.