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Metta World Peace back when he was Ron Artest in 2010. (Photo by Getty Images)

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Ronaldo won the 2002 World Cup ... and the 2002 "Best Hair in Sport" title. (Photo by Shaun Botterill/Getty Images)

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Maybe THIS is who inspired Ronaldo ... All Blacks great Jonah Lomu. (Photo by Getty Images)

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Carlos Valderrama in 1994. (Photo by Getty Images/Stephen Dunn/ALLSPORT)

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Andrew Symonds and his famous dreads. (Photos by Getty Images)

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Go the fro: Willie Mason back in 2003. (Photo by Daniel Berehulak/Getty Images)

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We could've created a whole gallery for David Beckham alone ... (Photo credit should read LIU JIN/AFP/Getty Images)

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He chopped and changed so many times in his career. (Photo by Getty Images/Gary M Prior /Allsport)

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Whoever let David meet Nelson Mandela looking like this should've been fired. (Photo by Touchline/Getty Images)

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The ladies weren't so keen on Cristiano Ronaldo back when he had the blond tips ... (Photos by Getty Images)

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Headband and a mullet was the '90s Andre Agassi. (Photo By John Russell/Getty Images)

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Djibril Cisse back when he was playing for Liverpool. (Photo by Michael Steele/Getty Images)

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French rugby legend Sebastien Chabal. (Photo by XAVIER LEOTY/AFP/Getty Images)

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Current Barcelona star Neymar during his time with Santos in 2012. (Photo by Ricardo Saibun/Globo via Getty Images)

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Wayne Rooney before ... (Photo by ANDREW YATES/AFP/Getty Images)

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Wayne Rooney after ... the transplant. (Photo by Matthew Peters/Man Utd via Getty Images)

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Matt King before ... (Photo by Mark Dadswell/Getty Images)

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Matt King after... A night out? A dare? A bet? We don't know, we just hope he didn't CHOOSE to do this. (Photo by Mark Nolan/Getty Images)

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Warwick Capper. (Photo by Getty Images)

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North Korea's best friend, Dennis Rodman, back in 1997. (Photo by Getty Images)

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Dennis Rodman was and still is an interesting character. (Photo by Gerald Herbert/NY Daily News Archive via Getty Images)

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Harry Kewell decided to rock the double ponytail for such an important occasion. (Photo by Adam Pretty/Getty Images)

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Will the real Slim Shady please stand up ... No, Greg Bird, please sit down. (Photo by Matt Roberts/Getty Images)

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The 1980s live on with Richmond Tigers' Ivan Maric. (Photo by Quinn Rooney/Getty Images)

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The Tigers' hairstylist must be the creative type. Here's star player Dustin Martin. (Photo by Quinn Rooney/Getty Images)

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French international footballer Bacary Sagna. (Photo by Dean Mouhtaropoulos/Getty Images)

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Michael Hurley of the Essendon Bombers. (Photo by Michael Dodge/AFL Media/Getty Images)

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Nick "The Honey Badger" Cummins. (Photo by Paul Kane/Getty Images)

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Kevin "Fresh Prince of Bel Air" Naiqama of the Wests Tigers. (Photo by Mark Kolbe/Getty Images)

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Jack de Belin of the St George-Illawarra Dragons managing to do worse than Beckham's attempt ... (Photo by Mark Kolbe/Getty Images)

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Dani Alves' future is unclear with Barcelona. We don't think he's doing his chances any good if he wants to stay. (Photo by JOSEP LAGO/AFP/Getty Images)