The acoustic singer is mulling over his options for what to get his 'Unconditionally' hitmaker girlfriend this year, and is reportedly interested in finding a rare timepiece.
A source said: ''He's asked a friend who's a rare watch dealer to email him photos of options. John's a great giver, who finds unique presents.''
The 'Your Body is a Wonderland' star will have to go a long way to beat last year's gift, when he got her a custom designed guitar covered in intricate designs, including her initials and the date they first met.
A source said at the time: ''Since they met he has been trying to prove he isn't the guy everyone says he is.
''This should definitely prove that - every little detail on the guitar shows how much he thinks of her.''
Since he started dating Katy in summer 2012, John appears to be a changed man and to have put his womanising days - which saw him date stars including Jennifer Aniston, Cameron Diaz and Jessica Simpson - behind him.
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The Scottish comedian has been speaking about gaining a knighthood in the Queen's Birthday Honours List.
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The creator will be able to give her input during season 2 production.
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