A1
: 
You get stars based on note percent AND score. Make better use of you star power, try to use it on sections with alot of notes and when you have 4x multiplier.
A2
: 
U have to play it on at least medium and its not percentage cause me and my friend played tonite I'm gunna rock you tonite and both got 100% and still only got 4 stars you have to get a certain amount of points.
A3
: 
The whole star system has absolutely nothing to do with the percentage of notes you get correct. The star system is based solely on your score. Each song has a set point range for each star rating. Sorta like: 30k-65k = 3 stars, 66k-99k = 4 stars, 100k+ = 5 stars. I have scored 5 star ratings for songs that I only made an 86% on. And on some songs, I get a 4 star rating even though I nail 96% of the notes. It's all about the score. Getting a 4X multiplier, then jacking it up to 8X with star power where there's a lot of notes.
A4
: 
If you want to get 5 stars, don't worry. just make a huge combo. Trust me, I 5-starred Free Bird on Expert with 83%. No joke! I just didn't mess up the slow part and the 1st part of the solo. All you have to do is just not mess up on stuff you could do.
A5
: 
The stars you get depend on your score. try to get star power and activate it when you have a solo or your multiplier is at 4x
A6
: 
Its not about the score or the percent, its about the average multiplyer. >2.0 for 3 stars, 2.0 for 4 stars, 2.8 for 5 stars.
no joke. I played several songs to figure this out. I got 2.7 on different songs and only got 4 stars. when I got 2.8 or higher on any song I got 5 stars. as far as I know this only applies to single player. co-op im certain is score related.
A7
: 
The third answer is totally bogus.
It's % and pts. According to "pts only" there's no way to get more than 3 stars on many of the songs (they are very short and with their highest possible score, using star power throughout, you can still only get about 55,000 pts. And that's definitely not fact, because I've gotten 5 stars SEVERAL times on short songs with
A8
: 
The 3rd answer is right.
It's about the points.
EACH song has a set range of points to get each star rating.
Keeping a good combo going is a good strategy to get a high score. Using star power to further higher your score is extremely helpful.
A9
: 
Its about pecentage NOT SCORE!
A10
: 
Ok look in co-op you will need both percentage and score, but they must work together. Like if one person gets 50% but the other gets 100 you will get 3 star. not only this but the scores must be good unless you both get 100 percent and dont use star power. Star power also counts, the less you use it the more stars.
A11
: 
I am going to have to go with the assumption that the song you played was Tonight I am Gonna Rock (Tonight), in any case, there are some songs that simply require one of you to be doing Hard mode to aquire enough points to achieve the rating. For ex: if you play TIGRT both on easy and both get 100% of the notes with no foul up s and using all the star power phrases in the correct point, you will still only get 4 stars. If you think I am wrong guitar gurus, try it yourself.
- its points not percentages that get you the star rating (with exception to five gold in single player)
A12
: 
You can sit there and not use ANY Star Power and get 5 stars... you have to get a high enough percentage on EACH SECTION OF THE SONG. To check how you did, go to "More Stats" after you finish the song. There's a cutoff percentage, and you have to get at least that much on EVERY SECTION to get 5 stars.
A13
: 
WOW! in Guitar Hero its all about your score. % has absolutely nothing to do with it. There is a certain score you need for different amounts of stars. You can get 60% on a song and still 5* it as long as you have a high enough score. If you think i'm wrong look at scorehero.com
A14
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I got a 98% on one song and only missed 5 notes and I still only got 4 stars! But then I played it again... and got a 95% and got 5 stars!1...yea thats crazy huh?...the video game makers come up with some bogus stuff! haha
A15
: 
Ok, hopefully I can end this whole chain of answers right here. the GH2 starring system is ONLY based on score. believe me, im about 5 songs from getting 5 stars on all expert songs. the percentage is just to tell you how you did, and where your strengths are. There is an exact point value you have to reach to get five star. I swear, some of these people are such noobs.
A16
: 
It's all based on points man...go to scorehero.com and it gives you the total score to beat for each song. If you do that then you get the amount of stars it says next to the score. I know people are saying stuff like its multiplyer and stuff but the truth is you probaly need a good enough multiplyer to get the points...but overall its points
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Guitar Hero 2 :