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If you're anything like us, you're feverishly collecting World Cup stickers like there is no tomorrow.

From the illicit thrill of spending actual money on Panini's finest to the joy of seeing that Iran squad fill up, there's nothing like it.

Except, perhaps, looking back on some of the cracking sticker portraits from years gone by.

Ahead of this summer's tournament, we've taken a look at how some of football's biggest stars have changed over the years.

Oh, and if you're loving collecting this year then here's why it's COMPLETELY NORMAL AND ALLOWED for

Xavi

Then: Fresh-faced tiki-taka maestro.

Now: Designer stubble and mild scowl.

(Image: Panini)

Javier Zanetti

It's official: He doesn't age.

(Image: Panini)

Wayne Rooney

Hair today, gone tomorrow.

(Image: Panini)

Robin van Persie

Then: Youthful promise.

Now: Post-David-Moyes joy.

(Image: Panini)

Gianluigi Buffon

Then: Unkempt, rash-vest chic.

Now: Clean-cut vet.

(Image: Panini)

Iker Casillas

Then: Shouldn't you be in school?

Now: Cool older brother.

(Image: Panini)

Clint Dempsey

Then: Call the police. Now.

Now: Reformed character.

(Image: Panini)

Landon Donovan

Then: Dude! Where's my car?!

Now: In your garage. Let's be serious.

(Image: Panini)

Didier Drogba

Then: I'm watching you, middle distance.

Now: And still. You won't escape.

(Image: Panini)

Andrea Pirlo

Then: Alan Rickman.

Now: Bearded Alan Rickman.

(Image: Panini)

Michael Essien

Clearly taking tips from Javier Zanetti.

(Image: Panini)

Miroslav Klose

Then: Class geek.

Now: Class geek who's now a millionaire with a mansion and a car and a model wife.

(Image: Panini)

Frank Lampard

Then: New recruit.

Now: I've seen some scary things, son.

(Image: Panini)

Samuel Eto'o

OK, so you're literally getting younger. Some Benjamin Button witchcraft at play.

(Image: Panini)

Patrice Evra

Then: I HATE Raymond Domenech.

Now: I HATE David Moyes.

(Image: Panini)

Diego Forlan

Then: Casanova.

Now: Party's over.

(Image: Panini)

Steven Gerrard

Then: Killer ferret.

Now: Wise old stoat.

(Image: Panini)

Andres Iniesta

Then: Playmobil.

Now: Action Man.

(Image: Panini)

Philipp Lahm

Then: Gap ja.

Now: Business casual.

(Image: Panini)

Lionel Messi

Then: King of the mods.

Now: Don't look at me.

(Image: Panini)

Arjen Robben

Then: Cut inside.

Now: Cut it all off.

(Image: Panini)

Cristiano Ronaldo

Then: Shaky hands when shaving.

Now: Irina Shayk.