I believe you might be referring to "Showtime," which is a popular song by the South Korean girl group EXID. Released in 2016, it became one of their signature hits and helped boost the group's popularity both domestically and internationally. The song is known for its catchy chorus and the iconic "Up & Down" dance move associated with it. However, please note that there was no specific "Showtime" performance or release that I'm directly referencing here; rather, this is a general mention of the song and its impact on EXID's career. If you're looking for information about a particular performance or release related to "Showtime," could you please provide more details?