TODAY IS JUSTIN Bieber’s 19th birthday.

He’s only a young whippersnapper, so we think there’s still time to teach him a few lessons.

While there are many things we think he could stand to learn, the most pressing issue appears to be his choice of trousers.

In his downtime he seems to favour a variation on the saggy nappy look favoured by toddlers, as evidenced by these photos.

YouTube/michieeeeeeeeeeeee

His ex-girlfriend Selena Gomez apparently had a right old laugh over this one, and who could blame her?

YouTube/TMZ

Not even a white ferrari is going to make these things look cool.

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Onstage, it’s a more heavily constructed look, with tougher fabric, but still the crotch is in the wrong place.  Perhaps he just needs a new tailor?

TLF/AFF/EMPICS Entertainment

One way or the other, they are not practical, as evidenced by his constant yanking at them.

Jordan Strauss/AP/Press Association Images

Joe Giddens/PA Wire/Press Association Images

Instagram/justinsagging

Come on Justin - how many times do your trousers have to fall down for you to realise they just aren't working for you?

Take this birthday lesson and run with it.  And before you respond with something like this...

Instagram/JustinBieber

...remember, no one likes a smart alec.

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