Don't let anyone tell you that flipped-out bobs and lobs aren't the haircut of 2024. Christina Aguilera rang in the new year with her shoulder-length one, and then Emma Stone turned up (literally) to multiple events with (including the Golden Globes) with one of her own. And now it's clear that the celebrity flippy bob is getting progressively shorter as an unexpected new participant has entered the chat: Jennifer Lopez.