Here is the full list of all 30 Karaoke achievements worth 400 gamerscore. It takes around 25-30 hours to unlock all of the achievements on Xbox 360.
Best singer in the world!
Turn up the heat with your poses!
Sea of Fans!
Reach for your dreams!
Even your Fans can't do this!
Earn 15,000 or more Fans with one song
Your Fans are copying you!
Use 30,000 Moola all at once when leveling up
Do a gig with a chorus in the backup band
Earn 10,000 or more Fans in 1 session
You are the greatest!
Become the Legend!
Register 100 songs in History
Welcome to the top!
Capacity limit? What capacity limit?
Come back and try some more freebies soon!
Do a gig with a DJ in the backup band
Do a gig with a keyboard in the backup band
Do a gig with a bass in the backup band
Sing 5 Favorite songs back to back
Sing 50 songs
Aim for the top!
Do a gig with a drum set in the backup band
Added a song via Smart Glass
So many songs in your repertoire!
Your Fans are waiting for you...
Sing the same song twice in a row
Congratulations on going the distance!
Do a gig with a guitar in the backup band
Congratulations on your debut!