A Jay-walk down Memory Lane

Its host may not be the sentimental sort, but we can't resist offering a few highlights from 17 years of "The Tonight Show With Jay Leno":

May 25, 1992: Billy Crystal delivers as Leno's first guest.

July 13-16, 1992: Paula Poundstone reports from the Democratic National Convention in New York, becoming the first of several celebrity correspondents during political seasons.

May 20, 1993: On the night of the final "Cheers" episode, a drunken cast yuk it up from a Boston bar.

March 2, 1994: In the midst of the O.J. Simpson trial, Leno welcomes the Dancing Itos.

May 16-20, 1994: Jack Paar does a walk-on when the show does a week from New York.

Sept. 27, 1994: Another former "Tonight" host, Steve Allen, appears to help christen a more intimate set.

July 10, 1995: Hugh Grant makes a confession about his dalliance with a hooker; the show moves to No. 1.

Nov. 4, 1998: John Glenn helps Leno interview astronauts aboard the Space Shuttle Discovery.

March 13, 2000: New York Giant Jason Sehorn proposes on the air to girlfriend Angie Harmon.

Oct. 17, 2001: To raise money for the Twin Towers Fund, Leno auctions off a motorcycle signed by celebrities, including Nicole Kidman and Denzel Washington.

May 12, 2003: Leno and Katie Couric switch places, giving the future CBS anchor a chance to interview Simon Cowell.

Jan. 24, 2005: Bob Newhart and Don Rickles reminisce about Johnny Carson, who had passed away four days earlier.

March 19, 2009: Barack Obama appears, becoming the first sitting president to be a guest on a late-night comedy show.