Powerful, Power-packed, Power-driven..........Primes!

Number Theory Level 4

How many prime numbers less than $100$ are there which can be expressed in the form $a^{n}+b^{n}$ where $a,b$ and $n$ are all natural numbers and $n≥2$ .

Details and Assumptions:

$a$ and $b$ can be non-distinct natural numbers.
Don't double count the primes.