Complex sentence: Parade have been a support act for Shakira at her UK shows at Manchester's MEN Arena on the 14th December, 2010 and London's O2 Arena 20th December, 2010, Ellie Goulding in Keele and Alexandra Burke on her UK'All Night Long' tour.
Split into simpler sentences: Parade have been a support act for Shakira at her UK shows at Manchester's MEN Arena (14th December 2010) and London's O2 Arena (20th December 2010), as well as supporting Ellie Goulding in Keele. Further to this, Parade supported Alexandra Burke on her UK'All Night Long' tour.