Gold stars can only be achieved on the Expert difficulty
The achievement can only be unlocked by playing songs in Quickplay.
Gold stars are rewarded for getting a high enough score past the 5 star rating. Luckily the game comes with a 'talkie' singing track called Dead Black (Heart of Ice) by Soul Remnants
, the song is rather long but you can 100% it by simply talking, breathing, screaming, blowing a fan into the mic etc.You can use USB mics or headsets which hopefully most of you will own.
The gold star score mark seemed to be around 100,000. Achieve over that on the song and the achievement will pop once the song finishes.
You will also unlock the following if you havnt already Obviously any DLC tracks that are talkies will be shorter but they also cost additional money
There are some easy Bass tracks to get golds on Friday I'm In Love by The Cure
around the 128,000 mark and The Warrior by Scandal
though I didn't catch that score (Also easy for 500 note streaks for