Since pop stars have armies of stylists and glam squads at their disposal, they can change their hair color, cut, length and texture on a daily basis or on a whim. If they want to go from short to long or from bangs to bangs-free or from black to pink, they can! So which pop stars have had the most dramatic hair makeovers?

Well, there's Justin Bieber's definitive and famous swoop bangs, which he abandoned for his James Dean pompadour. Or Katy Perry's penchant for trying every color of the rainbow in a calendar year. Oh and what about Lady Gaga's vacillation between long and short? Don't forget Jessie J's switch from Bettie Page blunt bangs to a buzz cut, which she did for charity. Or Miley Cyrus' punk rock pixie cut. Don't get us started on Rihanna's fickle follicles.

We've rounded up some of the most dramatic and drastic celebrity hair makeovers. The only constant is change for these peeps.

Miley Cyrus

Miley Cyrus
Jason Merritt, Getty Images / Instagram
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Justin Bieber

Justin Bieber
Neilson Barnard, Getty Images / Instagram
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Taylor Swift

Taylor Swift
Bryan Bedder / Tim P. Whitby, Getty Images
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Britney Spears

Britney Spears
Jason Merritt / Frederick M. Brown, Getty Images
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Beyonce

Beyonce
Dimitrios Kambouris, Getty Images / Instagram
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Katy Perry

Katy Perry
Michael Buckner / Frederick M. Brown / Christopher Polk, Getty Images
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Lady Gaga

Lady Gaga
Pacific Coast News / Dimitrios Kambouris, Getty Images / Pacific Coast News
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Rihanna

Rihanna
Allison Joyce / Samir Hussein / Pascal LeSegretain, Getty Images
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Jessie J

Jessie J
Eammon McCormack / Stuart C. Wilson, Getty Images
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Chris Brown

Chris Brown
Jason Merritt / Valerie Macon, Getty Images
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Alicia Keys

Alicia Keys
Frank Micelotta / Larry Busacca, Getty Images
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Justin Timberlake

Justin Timberlake
Frank Micelotta / Jason Merritt, Getty Images
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Demi Lovato

Demi Lovato
Robin Marchant / Paul A. Hebert, Getty Images
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