On Monday, three members of Russian feminist punk-group Pussy Riot were sentenced to two years in prison for hooliganism based on their critical remarks against Russian president Vladimir Putin and Russian Orthodox Church patriarch Kirill I. The international outpouring of subsequent protests over their sentence has highlighted the fine line between government censorship and artistic expression.

But Pussy Riot are hardly the first performers to provoke controversy over their actions, onstage or not. Take a look at other celebrities who may have gone too far, from Pussy Riot supporter Madonna to Janet Jackson.

Loading Slideshow...
  • Pussy Riot

    Members of the all-girl punk band 'Pussy Riot' Nadezhda Tolokonnikova, Maria Alyokhina and Yekaterina Samutsevich sit in a glass-walled cage during a court hearing in Moscow on Agust 17, 2012. A Moscow court today handed a two-year jail sentence to the three feminist punk rockers who infuriated the Kremlin and captured world attention by ridiculing President Vladimir Putin in Russia's main church. Various leaders of the European Union called the Russian court's sentencing excessive and disproportionate.

  • Madonna

    US singer Madonna performs at the Charles Ehrmann stadium on August 21, 2012 in Nice southeastern France, as part of her MDNA world tour. Madonna ended her current MDNA tour in France today in the southern city of Nice, where the France's National Front party (FN), which has a lot of support in this region, is resolutely waiting for her after she uses an image of a swastika superimposed onto the face of France's National Front leader Marine Le Pen in a video during her July 14 concert in Paris.

  • Adam Lambert

    Singer Adam Lambert performs onstage at the 2009 American Music Awards at Nokia Theatre L.A. Live on November 22, 2009 in Los Angeles, California. His out-of-pitch singing and aggressively sexual moves (in which he simulated receiving oral sex) turned off many viewers, not least of all the critics, who widely panned the "American Idol" runner-up's performance.

  • Janet Jackson, Justin Timberlake

    File photo dated February 1, 2004 shows US singer Janet Jackson with her breast exposed while singing with Justin Timberlake (R) during the half-time of Super Bowl XXXVIII at Reliant Stadium in Houston, TX. While Jackson's modesty was compromised only a few seconds during the show watched on live telvision by up to 100 million Americans, the incident became a politicallly-charged national controversy (CBS later released a statement deeply regreting the incident). Jackson's right breast transformed America's cultural landscape in 2004, unleashing a puritan backlash and a media crackdown that launched the country into a new conservative age.

  • M.I.A.

    Meant to be the sidekick to Madonna's much-anticipated 2012 Super Bowl performance, rapper M.I.A. drew harsh criticism for flicking the cameras off during the televised half-time show.

  • George Clooney

    US Representative Jim Moran, actor and activist George Clooney and his father journalist Nick Clooney are arrested for trespassing upon the Sudanese Embassy in Washington, DC, on March 16, 2012. Moran, Clooney and his father were protesting against human rights abuses by the Sudanese government.

  • John Lennon, Yoko Ono

    25th March 1969: John Lennon (1940 - 1980), singer, songwriter and guitarist with the Beatles, in bed in the Presidential Suite of the Hilton Hotel in Amsterdam with his wife, artist Yoko Ono. The couple stayed in bed for seven days as 'a protest against war and violence in the World'.

  • Susan Sarandon

    Academy Award-winning actress Susan Sarandon (2NDL), her friend Kathy Angel (2ndR), Ron Daniels (L), executive director of the Center for Constitutional Rights (CCR), and an unidentified man march past police toward New York City Police headquarters 25 March in an act of civil disobedience. The CCR is attempting to focus public attention on police misconduct in New York City and nationwide. The group was arrested by police.

  • Ozzy Osbourne

    In one of the most disgusting did-they-go-too-far moments, rocker <a href="http://www.telegraph.co.uk/culture/books/booknews/6209030/Ozzy-Osbourne-describes-biting-head-off-bat.html" target="_hplink">Ozzy Osbourne notoriously bit the head off a live bat</a> during a concert in 1982. The former Black Sabbath frontman-turned-reality show star, who said he thought it was a rubber toy, later wrote of the incident, "Immediately, though, something felt wrong. Very wrong... Then the head in my mouth twitched."