Vegas Vacation

Vegas Vacation is a 1997 comedy film directed by Stephen Kessler. It is the fourth installment in National Lampoons Vacation film series, and was written by Elisa Bell, based on a story by Bell and Bob Ducsay. The film stars Chevy Chase, Beverly DAngelo and Randy Quaid, with Ethan Embry and Marisol Nichols as Griswold children Rusty and Audrey. The film opened atat the box office and grossed over 36.4 million domestically. Vegas Vacation became the first theatrical Vacation film not to carry the National Lampoon label or a screenwriting credit from John Hughes.

Upon arriving in Vegas, the family embarks upon a series of mishaps and adventures. Clark crosses paths with Cousin Eddie Randy Quaid, the husband of Ellens cousin Catherine Miriam Flynn. Eddie and his family now live in the desert just north of Las Vegas, on what used to be an atom bomb test site. While on a group tour of the gigantic Hoover Dam led by guide Arty John P. Finnegan, Clark foolishly leaves the group after accidentally creating a leak in the dams inside walkways, and is forced to climb the scaffolding to the very top of the dam to get out, because his cries for help cannot be heard over the roaring water of the spillway. Later that night they attend a Siegfried amp Roy show.The next night, tickets to a Wayne Newton concert and a dress for Ellen are sent in the mail. They go to the concert, only to realize that Newton had sent the dress, and while singing, he has Ellen go on stage and sing with him. ........

Source: Wikipedia