LAS VEGAS (AP) — Celine Dion (pictured) has cancelled the next five performances of her “A New Day” show and an appearance at the Billboard Music Awards because of a highly contagious respiratory infection, show producers said Wednesday.The 38-year-old Grammy-winning singer was being treated for Mycoplasma bronchitis, a contagious bacterial infection, and has been ordered to rest during her recovery, producers said.

Performances of “A New Day” at Caesars Palace, a revue created by former Cirque du Soleil Artistic Director Franco Dragone, were canceled from Wednesday through Sunday, after which Dion was scheduled to take a holiday break from the five-show-a-week regimen. The show will not resume until December 28.

Dion also backed out of a scheduled appearance at the Billboard Music Awards in Las Vegas on Monday.