Ally Brooke, Normani Kordei, Lauren Jauregui, and Dinah Jane of Fifth Harmony perform onstage during the People's Choice Awards 2017 at Microsoft Theater on Jan. 18, 2017 in Los Angeles.

Fifth Harmony, who was scheduled to sing the U.S. National Anthem at the 2017 NHL All-Star Game, has canceled the performance due to illness, Billboard has learned.

Courtney Daniels replaced Ally Brooke, Normani Kordei, Dinah Jane and Lauren Jauregui to sing "The Star-Spangled Banner" at the Sunday (Jan. 29) hockey game at Los Angeles' Staples Center.

Just two hours before the performance, the group was tweeting about the event, writing: "Happy #NHLAllStar day!!!" As of press time, the girls have not tweeted any further updates.

The NHL All-Star Game lineup also featured Carly Rae Jepsen, singing Canada's National Anthem, as well as Nick Jonas, who is slated to perform during the second intermission.