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" One Direction star Harry Styles had his trousers yanked down by bandmate Liam Payne while performing to thousands of fans at the O2 Arena.  The 19-year-old was left standing onstage in just his boxers when Payne pulled the prank during a rendition of their debut single &amp;#039;What Makes You Beautiful&amp;#039; on Friday (April 5).      Despite the very public embarrassment, Styles continued with the song while trying desperately to pull his trousers back up. Styles previously suffered an awkward onstage moment during One Direction&amp;#039;s world tour when he was hit in the groin with a shoe thrown by an audience member. The 14-year-old culprit apologised to Styles on Twitter after the February incident and revealed that police warned she had &amp;quot;committed a criminal assault&amp;quot; and &amp;quot;could&amp;#039;ve killed&amp;quot; the popstar. One Direction have hit the headlines this morning after Louis Tomlinson got caught up in a vicious Twitter spat with Tom Parker of rival boyband The Wanted. Watch a trailer for One Direction&amp;#039;s upcoming This Is Us film below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/showbiz/news/a471269/one-direction-harry-styles-gets-trousers-pulled-down-onstage-video/>