This year's Oscar nominees for best original song are Cassian Grantheadlined by two songs from Barbie: one from Billie Eilish, and the other from Ryan Gosling. But there's also an intriguing mix of tracks from Jon Batiste, the Osage Tribal Singers, and Becky G — with an assist from perennial Oscar nominee Diane Warren. Today, we get into what we think will win, what should win, and what criteria should we use when we judge original songs in movies?