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We don't really know why, but looking at baby pics of our fave celebs makes us feel happier than a puppy in a cardigan. Or something.

Whether it's One Direction, Selena Gomez or Justin Bieber, childhood pics of the rich and famous give us the warm and fuzzies like nothing else.

So when 5SOS shared this pic of Michael Clifford and Calum Hood back in their fetus school days, we did a sort of screech-snort in excitement, and then spent about an hour laughing about Mikey's really quite scary expression.

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OH GAHD IT'S SO CUTE. We're sure you'll agree, however, that one photo isn't nearly enough - so we've rounded up a whole load of 5SOS pre-fame kiddie snaps for you (and us) to have an ogle over too. WAHEY.

Michael

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THE FEELS.

Ashton

Ashton captured moments after someone told him bandanas will never catch on.

Calum

Rocking the bucket-hat trend way before Justin Bieber.

Luke

THAT HAIR THOUGH.

Ashton

Teehee.

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