Lenses for nikon t3i rebel dslr?

I just wanted to know what somee good lenses would be for my camera? I still have the stick one, and it's okay. Just need one better. I was thinking about getting a fisheye lens (there was one in this bundle on Amazon with 3 lenses and a bunch of other stuff for $100). But other than that, I don't know what else to get.

I don't want anything too high in price since I'm not a pro or anything, just something above what i have now.

Any help would be thankful!

Which one do you need lens for, the Nikon or the Canon?

A big black one.

Are you sure it's a nikon T3i, because my T3i is canon and I don't want to give wrong information.

I have a 50mm 1:1.8 EFS 18-55mm EFS 55-250mm and the 18-135mm STM lenses.

Get 35mm 1.8g prime on Nikon
Or the 50mm 1.8 prime on Canon

If you want fisheye with low price, Samyang 14mm f2.8 or Samyang 8mm f2.8

35mm 1.8g Nikon very sharp- http://www.amazon.com/...001S2PPT0/

50mm 1.8 Canon very sharp as well - http://www.amazon.com/...00007E7JU/

Samyang 8mm f2.8 best price vs performance - http://www.amazon.com/...zon.com/s/" class='ext_link'>http://www.amazon.com/...zon.com/s/

Samsung 14mm f2.8 - http://www.amazon.com/s/