During this time, the group start performing songs with more complicated three-part harmony.

And she kept trying to include the audience; at one point she demonstrated how to sing a three-part harmony.

The implementation of three-part harmonies, expressed by some to be the most significant addition to the series, was well received.

When she sings, her voice is in three-part harmony.

Then all three came down the big water slide, their legs wrapped around each other, screaming joyfully in three-part harmony.

Think of it as music class, Dan-we need to find a three-part harmony.

Almost 60% of this book's songs are presented in three-part harmonies.

Originally conceived to be a three-part harmony, it was later decided to separate out the voices that started each verse.

The group's sound was characterised by rich, three-part vocal harmonies.

"I just ask them what kind of voice they have - we sing three-part harmony - and tell them to join that section," she said.