Kane Brown might hope he's "Cool Again" like last summer, but the country star is currently burning up on the Billboard Hot 100 with a No. 68 debut (chart dated May 9)."We wrote 'Cool Again' at a writing retreat when it was about 20 degrees outside," Brown said about the song of the summer contender, which he released last month and wrote with Josh Hoge, Matthew McGinn and Lindsay Rimes.