Also known as: スーパーライブフェス衣装, コングラッツブルーム
A discontinued annual Idolmaster Side-M event that shows off the top 5 characters of the yearly popularity poll.
The tag refers to the outfit used for the event; a white suit with a Capelet and a Rose of the character's motif color or the color of their game category. The official name of this costume is Congrats Bloom.