One Drop Pix: Siegfried & Roy, Mary Wilson and Holly Madison as a Ginger

"One Drop" performers were on the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

Cirque du Soleil founder Guy Laliberté was on the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

Siegfried and Roy walk the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

Boyz II Men walk the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

Mary Wilson walks the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

John Popper of Blues Traveler walks the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

Holly Madison, with red hair, walks the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

Claire Sinclair walks the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

"Real Housewives" cast members were on the blue carpet Friday at the One Drop fundraiser at Mandalay Bay. (Courtesy/Bryan Steffy/WireImage)

The Tenors arrive on the blue carpet for Cirque du Soleil's "One Night for One Drop" at Mandalay Bay on Friday, March 21, 2014, in Las Vegas. (Bryan Steffy/WireImage)

The weekend’s big celebrity event at Mandalay Bay brought out old and new faces: Siegfried & Roy, Boyz II Men, Mary Wilson, Blues Traveler, a bunch of “Real Housewives,” Holly Madison in red hair, Claire Sinclair, Forrest Griffin, Roy “Big Country” Nelson, Jabbawockeez, Criss Angel, Olympic gold medalists Esther Lofgren and Susan Francia, some “Thunder From Down Under,” some “Fantasy” women, DJ 88, comedian Heather McDonald and, of course, Carolyn and Oscar Goodman.

This was for the One Drop charity, which provides resources to people in need of clean drinking water around the world. More than 100 performers showed how artistic and athletic they are with Cirque and Cirque-esque acts.

Cirque du Soleil founder Guy Laliberté thanked the crowd for helping change the world.

Wilson and Blues Traveler performed at the swanky after-party.

It was a long Friday night of egalitarian elitism, balanced on the broad shoulders of art-athletes and charitable donors.