Right now it's locked :( I'm doing another campaign in Vegas but I think I've done 2 at once before? Oh well! I hope it clears up soon. Mainly because I hate having those bubbles over there. I like to know I've done everything I'm supposed to do!
Does the amount of stars and hearts you have in your wardrobe need to change with each level you're on? I'm a level 8 and I haven't seen the bonus star for the tasks I have to complete, but I did see them at lower levels.