The cover of Selena Gomez in 2009 for the magazine "Seventeen" was named one of the best and impressive covers of magazines, see the full list:
Avril Lavigne - April 2007
Hilary Duff - April 2007Rihanna - December 2007 / January 2008
Beyoncé - December 2008 / January 2009
Lauren Conrad - April 2009
Taylor Swift - May 2009
Hayden Panettiere - August 2009
Selena Gomez - September 2009
Miley Cyrus - December 2009
Nina Dobrev - April 2010
Miranda Cosgrove - 2011