"Colors" is a nice song from the beginning, but the chorus is straight-up electrifying.
The remix of "Castle" for The Huntsman: Winter's War manages to take the awesomeness of the original and amplify it, with its haunting background vocals and epic orchestral instrumentals.
"3am" is high-energy and extremely catchy, with a kickass guitar riff, perfect for screaming along to while you drive.
"929," which closes out Manic, is a shorter song with a very simple melody that perfectly matches what are some her finest lyrics yet. It's essentially three minutes of Halsey pouring her heart out, and it'll bring tears to your eyes.
"Easier Than Lying," from If I Can't Have Love, I Want Power. In a similar sort of ballpark to "Experiment On Me", Halsey leans into hard rock with the help of Trent Reznor and Atticus Ross and yields fantastic results.
"So Good" is, well, so good! It's emotional, gripping, and has a complex, soaring, and catchy melody with beautiful lyrics about overcoming a breakup and moving on with life.
