6 Weeks: Robin Thicke, Pharrell Williams & T.I - 'Blurred Lines'
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The Longest Reigning No.1 Singles In Big Top 40 History

6. 6 Weeks: Robin Thicke, Pharrell Williams & T.I - 'Blurred Lines'
Pharrell had spent just one week off the top of the chart with 'Get Lucky' in 2013 before this catchy Robin Thicke collaboration took over and spent a mammoth SIX weeks at No.1.