Artists of the Cirque du Soleil work out backstage ahead of the show “Quidam” during a photo opportunity for the media at the Meo Arena pavilion in Lisbon, Portugal Thursday, December 18, 2014. (Photo by Francisco Seco/AP Photo)

Artists of the Cirque du Soleil perform on the stage during the show “Quidam” at the Meo Arena pavilion in Lisbon, Portugal Thursday, December 18, 2014. (Photo by Francisco Seco/AP Photo)

Wigs and hats of the artists of the Cirque du Soleil rest on a big boxes used as wardrobes backstage ahead of the show “Quidam” during a photo opportunity for the media at the Meo Arena pavilion in Lisbon, Portugal Thursday, December 18, 2014. (Photo by Francisco Seco/AP Photo)

A performer from Cirque du Soleil's show “Quidam” practices backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

Artists perform during “Quidam”, a show by Cirque du Soleil, at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

A performer from Cirque du Soleil's show “Quidam” practices backstage before a show, at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

An artist performs during the show “Quidam” by Cirque du Soleil, at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

Wigs and hats are seen backstage before Cirque du Soleil's show “Quidam”, at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

A performer from Cirque du Soleil's show “Quidam” practices backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

An artist performs during the Cirque du Soleil's “Quidam” show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

A woman mends shoes backstage before the Cirque du Soleil's show “Quidam” at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

A performer from Cirque du Soleil's show “Quidam” practices backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

An artist performs during the Cirque du Soleil's “Quidam” show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

A performer from Cirque du Soleil's show “Quidam” practices backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

Performers from the Cirque du Soleil's show “Quidam” rest backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

A performer from Cirque du Soleil's show “Quidam” practices backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

Performers from Cirque du Soleil's show “Quidam” practice backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

Artists perform during Cirque du Soleil's show “Quidam” at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

Performers from Cirque du Soleil's show “Quidam” practice backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

A performer from Cirque du Soleil's show “Quidam” practices backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)

Performers from Cirque du Soleil's show “Quidam” practice backstage before a show at the MEO Arena in Lisbon December 18, 2014. (Photo by Rafael Marchante/Reuters)