Fifth Harmony sounds grown in "I'm In Love with a Monster," off the Hotel Transylvania 2 soundtrack. Yes, the Harmony Samuels-produced song has vampires and werewolves in mind (the film, starring Adam Sandler, has a vampire couple signing their son up for "monster-in-training" boot camp), but the girl group brings so much attitude and sass — "My momma told me that I should have better taste / but I'd rather pay to see the look on her face" — that by the end, it feels like a logical follow-up to the platinum-selling "Worth It." Listen above.