Louis Tomlinson admits he wasn't a model pupil.
The One Direction star, who loves to have a laugh, has never been able to resist mooning.
'I once got suspended for a week for getting my bum out during a school performance of Grease,' Louis, 20, confesses.
Niall Horan, 18, also found himself sent home for not concentrating on his schoolwork.
'I was not a bad boy but I got suspended for two days for messing about,' he tells The Sun.
'I talked too much.'
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