Exact Name domain name penalty?

My website jennifer-lawrence.com used to rank 1st page in Google for "Jennifer Lawrence", now it doesn't rank at all.
Webmaster tools says nothing about any penalties so it must be an algorithm penalty.
According to my Awstats Google referrals went down drastically in Feb of 2013 (87k to 38k) and then it went down even more in April, 2013 (10k).
Anyone have any idea on what exactly would cause my site to get deranked for it's exact domain match?

See original post by Josh Hughbanks