Popularity %

Does anyone know what % in popularity you need in an MS to hit 2*?

Look at the weekly $ income on the full list of music stores and see where you sit in your rank as well as for the stars above you as that's what its based off, much more precise than basing it off popularity

However since your company is brand new, you have to consider you need to have passed a certain amount of net revenue to be eligible to star up, even if your income is performing at a higher level; right now it looks like you're doing 4/5* levels of revenue but you'll have to wait until you've made enough money / the company is old enough to allow the star up to there. To estimate this I'd maybe look at companies above you in level and find the most newly created companies' age, should give you a decent estimate of when to expect it.