wide angle lens

hello all of my camera uses 50mm f1.8. but it's too narrow for some uses. what are other lens maybe wide angle lens that will give me a frame that can fit Taylor Swift from her head up to her knee in a distance of 1/2 meter? is there anything under $150?

I have a Nikon D3000 (a very basic DSLR) which I use with the kit lens (18-55mm) as well as the great Nikkor 35mm F1.8 lens. I am in the market for a wide angle lens, but have read many places that wide-angle attachments (which are sooo much more affordable) are an option, too. What wide...