Sheryl Crow has completely changed her outlook on life since becoming a mother.

The singer - who has adopted sons, Wyatt, three, and five-month-old Levi - says she is a lot less selfish as she now puts the needs of her children above everything else.

She said: "Kids change your life - period. The first thing you think of in the morning and the last thing you think of at night is them, and every decision that you make in between is dictated by their welfare.

"My tour bus now is a family bus. I've got both my kids and everything that they count on to keep their lives normal on there, whereas before my life was much more me-centric."

Sheryl, 48, also says her outlook on her career and fans has changed after being diagnosed with breast cancer in 2006, which she successfully beat.

She told the NY Daily News newspaper: "Before I was diagnosed, I was very particular about not seeing the audience. I wanted the audience to be pretty dark, so there wasn't the distraction of making eye contact. Now I have to see people, I have to make that connection.

"That's what the experience is about. I find that the connection now with people is deep. Everybody is looking for a connection. It's what coming into a room with a bunch of strangers is about, to hear music and be moved. It started to feel much more like a Celebration for me."