Some artists have their songs already listed on the site:
http://www.tv-asahi.co.jp/music/ultrafes/
Did anyone see that email from TeamAyu? Looks like they either changed her performance or MSte did, as from what I understand the fans who were invited to attend are no longer able to?
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CDL 2010.12.31 * CDL 2011.12.29-31 * AT 2012.07.28, 08.11-12
AT 2013.07.13 * CDL 2014.12.30-31 * AT 2015.06.06-07
TA 2015.10.19-20 * AT 2016.05.15 *AT 2017.06.17-18, 29