Karaoke Revolution
51 Achievements
PS3
Bigtime Booster
Earn 6x Multiplier from a single Star Boost
53.0%
How to unlock the Bigtime Booster achievement in Karaoke Revolution - Definitive Guide
You earn a Star Boost by getting the notes/pitch dead-on for a long period without missing any.
Do this continuously for a bit to get a 6x multiplier from a single star boost. Once you are around a third to halfway thru career you will certainly have this.