Question
When i look to my right my neck cracks or pops.  I am concered about what is it.  
It sometimes clicks more than once during movement, and other times just
once.  I am in good shape and am fifteen.  Can you please help

Answer
You may be in "good shape" physically but you may not be structurally.  It can not give you an exact answer without a proper exam, but you could have some vertebrae out of place.  I suggest talking to your parents and seeing a chiropractor.  The sooner the better.  If you let this get worse, other complications could follow, including weakness in your arms, nerve damage, or joint fusion which would lead to not being able to move your neck.  The popping and cracking in you neck is instability of the joints of the spine.  

Dr. Starbuck