Welcome back to the 80's!
From Julia Roberts to Sarah Jessica Parker and even Jessica Beals in the 80's movie Flashdance, perms were the way to style your hair. Long or short, curls were in and it looks like the trend is popular again.
Is it because it saves time styling or are girls getting tired of the sleek, straight look from the flat iron? Not sure, but don't be afraid to try it, you may love it. The tighter the curl, the longer the perm will last. You can expect 3-6 months. Google the Curly Shag to get an idea of what is currently the most popular style.