Hülya Şahin, aka Julia "Sunshine" Sahin, (born February 23, 1974, in Siegen, West Germany) is a German professional female boxer.

Hülya is an educated locksmith, working currently for the Cologne Transit Company (KVB) in the maintenance of ticket machines in trams.

Her mother raised heavy objections soon after she started to perform boxing, and she tried hard to convince her parents.

In 1995, only two years after she began performing kickboxing, Hülya became world champion in flyweight (52 kg) division at the full contact karate championships held in Kyiv, Ukraine.

[3] From 1998 to 2003, Hülya fought as an amateur boxer for Turkey, quickly becoming one of the most successful members of the national team.