it depends which game ur on
If you play Theorode's Mango Juggler then you can win it.
At the first or first and a half star. For instance: I got it when I had 17 awards, 18 friends, and had won 19 challenges. Try that.
You play a lot of games and at least 50 challenges. When you finally get 3 and a half stars, you will earn the rank.
First you must get five yellow stars. After that you will go on to blue stars. Getting blue stars might be very hard.