I thrive on being on the road, waking up in a different place every day and having my life revolve around music. When you walk out in front of 300,000 people and pull it off, it validates you.

The cheapest energy is the energy you don't use in the first place.

I am joining the more than 200,000 women who will be diagnosed with breast cancer this year... I am inspired by the brave women who have faced this battle before me and grateful for the support of family and friends.

I want to collaborate with Amy [Winehouse] because she's really hot and cool right now. I know one song Rehab was very popular particularly because a lot of young people are in rehab as well. In fact I'm thinking about going. It looks like loads of fun and I know my career will benefit from it.

I can always tell when people have had plastic surgery.

I don't set goals for myself too much, but I'm always trying to write that one great song.

I am sweet, I am ugly, I am mean if you love me. I'll try hard just to please you, when I say I don't need you.