Danny Phantom (2004)

S1E11 Fanning the Flames

Danny and Sam's close friendship takes an unexpected turn when Ember, a spirited rock ghost, manipulates their bond into a romantic one. This hard-rocking specter thrives on the adoration of teenagers and has a colossal concert coming up that will be streamed globally, granting her immense power. With only days to prepare, Sam must find a way to bring Danny, now hopelessly infatuated, back to reality and redirect his focus on battling ghosts. This may require her to make the painful choice of shattering his heart in the process.