But in other ways the music took on a life of its own.

The process they began took on a life of its own.

At a certain point, these things take on a life of their own.

But then the thing took on a life of its own.

The project began to take on a life of its own.

The energy here was beginning to take on a life of its own.

But the party is taking on a life of its own.

The meeting quickly took on a life of its own.

But the studies took on a life of their own.

You could say they take on a life of their own.