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Does this mean she's out of retirement? The petite singer was a surprise guest at Professor Green's show at KoKo in Camden last night, performing their hit single "Just Be Good To Green."

Lily Allen, who's five months pregnant with her first child, gushed that she "couldn't wait for Green to be an uncle" to her kid. How sweet! The 25-year-old singer seems so much happier now that she's with child, doesn't she?