Let me start with the definition of Rockstar :
rock star - a famous singer of rock music. rock 'n' roll musician, rocker - a performer or composer or fan of rock music. singer, vocalist, vocalizer
So expectation is that the soundtrack will feature some "good Rock Music" and when the composer is Grammy award winning A.R.Rehman expectation are always high.
Unfortunately this album fails as Rock part is just average.
Another negative is the selection of Mohit Chauhan for majority of songs
Being a fan or Mr Rehman i gave it a decent 3-4 hearing to be fair from my side.
If you follow rock music you can easily identify there are only 2 songs which can be categorized as 'rock'
Sadda Haq and Naadan Parindey
Good : Sadda Haq,Katiya Karun (ting-a-ling),Aur Ho,Naadan Parindey
Average : Jo Bhi Main(there is so much Ye-ye-ye in this song that it becomes irritating),Tum Ho,Kun Faaya Ku
Bad: Phir Se Ud Chala,Sheher Main,Hawaa-Hawaa,Tum Ko
Then there are 3 instrumentals which might sound really good when played in the movie
This is an album which might become a big hit but this ain't no 'Rock On' - Do not expect 'Rocking' from Rockstar.(Rating : 2.5/5)