Transformation Tuesday: Katy Perry

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2002

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2004

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2005

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2006

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2008

[Photo: Getty Images ]

2009

[Photo: Getty Images ]

2010

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2011

[Photo: Getty Images ]

2011

[Photo: Getty Images ]

2012

[Photo: Getty Images ]

2013

[Photo: Getty Images ]

2014

[Photo: Getty Images ]

2014

[Photo: Getty Images ]

2015

[Photo: Getty Images ]

Katy Perry's hair changes almost as much as she changes her unique fashion choices - which makes her the perfect person to look back on in this week's Transformation Tuesday! Katy may have started off looking like the girl next door back in 2002 but she has come a long way since, adding more bling and color with every passing year!

Whether she is rocking long black hair and a smokey eye, or a bedazzled leotard with a neon green bob, we can't get enough of how Katy continues to keep it interesting with every appearance and performance. She's always the perfect blend of sexy and cute, and she never takes herself too seriously! And now we're wondering how Katy is going to top herself at the Superbowl halftime show this Sunday...

Check out more of Katy's changing looks over the years in the gallery.

@katyPerry sure has changed a lot over the years! Can't wait for her Super Bowl halftime performance #TransformationTuesday ????????????

A video posted by VH1 (@vh1) on Jan 27, 2015 at 11:45am PST

[Photos: Getty Images ]