Pentatonix at The Warfield

In this photo made available on Wednesday, May 16, 2012, Eva Turnova, left, and Vratislav Brabenec of the legendary Czech underground band The Plastic People of the Universe perform during a concert for a support of Russian female punk rock band Pussy Riot in Prague, on Tuesday, May 15, 2012. Seven performers and bands including ones persecuted during the Czechoslovak communist regime joined the Tuesday's concert named "Musicians Are Jailed Again" to protest against the arrest of members of Pussy Riot. Three women were jailed in early March for belting out an anti-Putin "punk prayer" in front of an altar in the Christ the Savior Cathedral in Moscow. They were charged with hooliganism and face up to seven years in jail. (AP Photo/CTK, Katerina Sulova) SLOVAKIA OUT