Hilary Duff Celebrates 20th Birthday: Photo 617761

Hilary Duff editorial stock photo. Image of year, duff - 32456763

Hilary Duff Celebrates 20th Birthday: Photo 617761, Hilary Duff Photos

Hilary Duff Spends Birthday Weekend at Disneyland With Matthew Koma

Hilary Duff Celebrates 20th Birthday: Photo 617761, Hilary Duff Photos

MTV Pop singer/actress Hilary Duff appears on MTV's Total Request News Photo - Getty Images

Hilary Duff Celebrates 20th Birthday: Photo 617761, Hilary Duff Photos

MTV Pop singer/actress Hilary Duff appears on MTV's Total Request News Photo - Getty Images

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Hilary Duff At Arrivals For Teen Vogue Young Hollywood Party, Vibiana, Los Angeles, Ca, September 20, 2007. Photo By Adam OrchonEverett Collection

MTV Pop singer/actress Hilary Duff appears on MTV's Total Request News Photo - Getty Images

Hilary Duff Celebrates 20th Birthday: Photo 617691, Hilary Duff Photos

Tweet Saying Hilary Duff Is 'Still Looking Great' at 35 Receives Backlash

Tweet Saying Hilary Duff Is 'Still Looking Great' at 35 Receives Backlash

Hilary Duff Celebrates 20th Birthday: Photo 617471, Hilary Duff Photos

Hilary Duff Celebrates 20th Birthday: Photo 617761, Hilary Duff Photos