<Li> 2009 / 2010: Polish singers Dorota Rabczewska and Maryla Rodowicz both covered the song during New Year's Eve in Łódź (TVP2). </Li> <Ul> <Li> 2011: American rock band My Chemical Romance performed the song with Queen guitarist Brian May at the Reading Festival . </Li> <Li> 2011: Christina Aguilera, Cee Lo Green, Adam Levine and Blake Shelton covered the song on The Voice (U.S.). </Li> <Li> 2012: Canadian punk rock band Sum 41 covered the song live during their Asian tour in April . </Li> <Li> 2012: English pop singer Jessie J performed the song live with Brian May and Roger Taylor at the closing ceremony of the 2012 Summer Olympics in London on 12 August . </Li> <Li> 2012: English rapper Dappy covered the song live alongside Brian May for BBC Radio 1 Live Lounge . The song later appeared on UK chart - topping album BBC Radio 1's Live Lounge 2012 . </Li> <Li> 2015: American girl - group Fifth Harmony performed the song chorus for their tour,' The Reflection Tour' as a part of a mashup . </Li> </Ul> <Li> 2011: American rock band My Chemical Romance performed the song with Queen guitarist Brian May at the Reading Festival . </Li> <Li> 2011: Christina Aguilera, Cee Lo Green, Adam Levine and Blake Shelton covered the song on The Voice (U.S.). </Li>

Who sang we will we will rock you