Continuing the trend of gender switch-ups for year-end festivals, it's just been revealed that B2ST will transform into a 'beastly T-ara' for the upcoming "2010 SBS Gayo Daejun". T-ara's "YaYaYa" performances have been applauded for its fun and entertaining qualities; fans are looking forward to seeing how the ultra-masculine boy band will tackle T-ara's cute choreography. The two groups will also have a joint stage together, and the members will be paired up as couples. Another stage to look out for is the "maknae show", which will consist of maknaes from various groups performing Britney Spears' "Circus". The "2010 SBS Gayo Daejun" will be held at the Ilsan Kintex on December 29th. Source: Newsen