Cee Lo Green is "impressed" by his own success.

The 37-year-old signer's third solo album 'The Lady Killer' was released a year ago and the 'F**k You' hitmaker is still astounded by how well it has sold.

He said: "It's been pretty extensive, the success of this record. I'm impressed, I must say."

Cee Lo shot to fame as one half of Gnarls Barkley, with producer Dangermouse, when they had a huge hit with their 2006 single 'Crazy' and he insists he never tires of performing the track.

He said: "I still enjoy the song, it still belongs to me - to us - and it's as fresh as it ever was for me.

"I could never lose sight of what that song has signified to me, so I never get tired of it.

"I perform it 50 times a year, probably more."

Cee Lo also co-wrote Pussycat Dolls' biggest hit, 'Don't Cha', with Busta Rhymes and Sir Mix-A-Lot and said he penned the track from the perspective of an "ideal" woman.

He explained to Q magazine: "I was trying to think of an ideal woman - a creature of a woman - who would be so bold as to say something as outspoken as that song, you know?

"But I didn't think of myself as a woman [when writing it] even though I am a ladies' man."