Help

There are 6 awards--but i can only find 4. i've been trying everything but can't find where to go to get the other 2. can someone help?

The 6 things are:

1-Risha necklace-you get this through the rooftop hotel at top
2-Iron Baker "Dessert Channel" certificate-get this through Studio Stardom at top right
3-Key to the Galaxy Trophy-get this through Space restaurant at top Left
4-Engagement Ring from Jack-obtained from underwater restaurant at bottom
5-Time Bender trophy-get through Lost Art of Baking in middle section
6-LaVerre Award, which is 3 penguins,obtained in Polar restaurant at bottom left.

I need help in Cake Mania 2 to get to the studio stardom to find the iron baker I did all the worlds but I dont know how to get this thing

Do you have to get superstar level to get the trophies?