Justin Bieber tops Lady Gaga to rule Twitter
Justin Bieber performs at the Jingle Ball 2012 in Atlanta, Georgia December 12, 2012. REUTERS/Tami Chappell/Files
Lady Gaga performs onstage during the Rolling Stones final concert of their "50 and Counting Tour" in Newark, New Jersey, December 15, 2012. REUTERS/Carlo Allegri/Files
Women take up self-defence, pepper spray after Delhi gang rape.
Images from Prince Harry's second tour in Afghanistan.
President Barack Obama is inaugurated back into office.
The debate over gun control in America heats up with protests on both sides in the aftermath of President Obama's call for more action.