Happy songs are hard to write. Most songwriters will agree that it’s much easier to craft a sad tune over minor chords. With upbeat numbers, it’s easier to slip into something cringe-inducing once you ...

Last year, on her "Harlequin" album, Lady Gaga belted out a song that was nearly a century old: "Forget your troubles, c'mon, get happy. You better chase all your cares away. Sing 'hallelujah,' c'mon ...