Gwen Stefani's Madonna meal

Gwen Stefani has revealed Madonna invited her for dinner the last time she was in London.The 'Wind It Up' singer, who divides her time between her homes in Los Angeles and London, has rubbished rumours she and the 'Hung Up' singer have been feuding and insists they are actually becoming friends.Gwen told Australia's Daily Telegraph newspaper: "She's been nothing but nice to me. She's invited me to her house for dinner and clearly she's a huge inspiration to me musically.'' It had been reported that Madonna, 48, had accused the 37-year-old star of copying her career and even refused to accept a gift of some baby clothes from Gwen's own fashion range for her newly adopted baby David.Gwen gave birth to her first child, son Kingston, with her rocker boyfriend Gavin Rossdale, in May of this year.The 'Hollaback Girl' singer admits she is keen to expand her L.A.M.B fashion line.She said: "We will soon see L.A.M.B competing with Donna Karan's DKNY. The idea is to do the fashion for the rest of my life, although I hate saying it because if it folds everyone will know how much it hurts. There's not a lot of emotional drainage that comes with it. It's fun and rewarding but it doesn't really drain you."