One hot trend I have written about is Fifty Shades of Grey, my Squidoo page '10 books like fifty shades of grey' is one of my best Squidoo lenses at present. I do know that this is not an evergreen topic but I have found that you can do quite well with hot topics. This page is ranked second in Google for the keywords 'books like fifty shades of grey'. I should work on backlinks and move it to number one spot,as there is quite a difference in traffic between number one and number two position in Google.
If you are looking for current trends to write about I would suggest Valentine's Day themed articles, St Patricks Day themed articles and even Easter pages