South Korean rapper Psy's music video "Gangnam Style" became the first video on YouTube to get one billion views.

The milestone came less than a month after Psy's music video became the most watched item on YouTube, edging past Justin Bieber's song "Baby."

In the video, named after an affluent district in Seoul, the outlandishly dressed Psy raps in Korean and dances in the style of someone riding a horse.

American folk singer and political activist Joan Baez performed in Prague to mark the first anniversary of the death of Vaclav Havel, an anti-Communist playwright who became the former Czech president.

She performed a few songs at the concert commemorating Havel, who died at the age of 75 from a long respiratory illness.

In addition to a successful music career, Baez has been involved in numerous human rights causes and was instrumental in setting up Amnesty International in the United States.

Mila Kunis was targeted by a Ukrainian politician who called her an anti-Semitic slur in a rant on Facebook, according to online tabloid TMZ.

The word has been used pejoratively since the Holocaust. Kunis, who is Jewish and was born in the Ukraine, has not commented so far.