Sir Elton John has called a truce on his rocky relationship with pop superstar Madonna - by turning up at her concert in France.The Rocket Man sparked a war of words with the singer after he accused her of lip-synching at live concerts.But the singer appears to have put the row behind him, as he was photographed cheering on Madonna during her Sticky & Sweet tour in Paris on Tuesday.John was accompanied by partner David Furnish.

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