When Fallon booked Bruce Springsteen to appear on the show, he made Bruce his only guest that night and did the entire hour with him. Let it never be said that Jimmy Fallon won't give a legend their due.
Barbra Streisand. "The Tonight Show with Jimmy Fallon" guest. Streisand is LEGENDARY for being almost impossible to book. The fact that Fallon got Streisand in a major "Tonight Show" coup (she hadn't appeared on the show since the earlier Johnny Carson days)? OUTSTANDING.