Translation:The prettiest in the class has to be me.
The word for prettiest (peneste) is pronounced wrong here. The first vowel should be much longer. "Peeneste".
This sounds odd to me - "in THE class" is how you would usually hear/see this phrase in British English. North Americans, do you drop the "the"...?
I'm from Singapore (where our English was inherited from the British during colonial times), and we say "in class" all the time. Hmm :/
How would you translate similar sentence: "The prettiest in the class has to be mine"
No, we barely use "of" with superlatives. The world's strongest man is the strongest man in the world. That's how we speak.