The anthem singer for the Toronto Raptors- Brooklyn Nets game at Barclays Center Sunday struggled with the lyrics to "O Canada," and the Raptors responded by tweaking the Nets on Twitter.

Amber Iman, a member of the national touring cast of the Broadway hit "Hamilton," couldn't remember the lyrics to the Canadian national anthem and improvised. Among the ad-libs, she substituted "We sing our hearts for thee" for the thrice repeated, "We stand on guard for thee."

She did finish the song, however.