Harry Styles has been taking the mickey out of One Direction's make-up artist Lou Teasdale on Twitter.
The 18-year-old singer thinks Lou's description of dolphins is hilarious.
'According to @louteasdale dolphins are like 'Swimming cows'. Wow,' Tweets Harry.
But it's unlikely that Lou will be too bothered about Harry teasing her.
The 1D boys - who are currently on their first headline tour of the US - are close to Lou and her adorable 9-month-old daughter Lux.
Harry bonded with the little girl as they played on a laptop together earlier this year.
'Harry and Lux doin some spreadsheets makin some deals,' Tweeted Lou.
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