Michael Buble changed not to end up alone

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The singer admits he wasn't always nice in the past

He's known as one of the most charming and suave stars around, but Michael Bublé has opened up about his not so squeaky clean past.

'When my last relationship ended I had to ask myself a whole bunch of questions' he said to the Sun newspaper, 'I was pretty insecure...'.

'The difference is some people will know it and want to change, others won’t, but I thought if I don’t I’ll probably end up alone with long fingernails'. 

Bublé, who married Argentinian actress Luisana Lopilato in April 2011, has admitted he's calmed down and learnt to count his lucky stars.

This month he singer is releasing a deluxe edition of his 2011's album 'Christmas' containing new tracks and will tour the UK in 2013.