Yes, it has crept in, and been universally adopted.

The thing that irritates me most about it (our anthem) is that several years worth of students at the elementary school where I teach are convinced that there is a key change just before "God keep our land", due to the STUPID recording of it that they have been listening to once a week!!!!! Grrr...Now any time they are asked to sing the anthem without the accompanying tape, they sing the key change anyway!!!!!!!!!!!!!!!!!!!!!!!!!!