New mum Pink has overcome writer's block and is preparing to release her first album in four years.

The So What hitmaker admitted in November that she was having trouble coming up with catchy pop music since giving birth to daughter Willow last June, because she had lullabies on the brain.

She told Eonline.com: "She stops crying when I sing. I sing You Are My Sunshine and I make up songs for her because I'm goofy. (But) I promised my fans I wouldn't write an album full of lullabies."

Now, three months later, Pink appears to be back in career mode - the singer has posted a photo of her newly-dyed pink hair on Twitter.com and revealed she's working on the follow up to 2008's Funhouse.

She writes: "Okay the hair is the palest pink.... You know what that means!!!!!!!! NEW RECORD TIME! Let's get to making some tuuuunes. Looney tunes."