gerunds - What's the difference between "I love singing" and "I love to sing"?

I would like to know what the difference is between "I love doing something" and "I love to do something".

For example:

1. “I love singing.”

and,

2. “I love to sing.”

When I was young, I was told that "love doing something" is right, but one day, I found Jessie J wrote "I love to sing" on her Instagram.

I'm confused.

Thanks.