Default Gallery app freezes

Greetings fellow members!!

I've been facing this issue since last month. I can view the camera folder from d gallery app without any issue bt wen it cums to viewing whatsapp images nd downloaded fb images.. it freezes nd i hv to press d hardware button nd close it..

It's getting really annoying nd brings bad impression about my cool core.. Please help me fix this issue.. I've tried clearing data, cache nd even force closing it, bt none of it get it to work.. Plz help me peop..