My Songs Know What You Did In The Dark (Light Em Up)

Fall Out Boy

When Percy and Clarisse are climbing on some huge wooden contraption as a competition

Cameo Lover

Kimbra

Playing in the background at the coffee shop in Washington, D.C.

Walzer As Dur | Walzer Ab Dur (feat. Falk Richter)

Johannes Brahms

Luke is listening to this on his yacht when his minions bring in Percy, Annabeth, and Tyson.

It's a Small World

Richard M. Sherman

Annabeth and Percy sing this while riding the Plummet of Death in Circe's Amusement Park.

To Feel Alive

Iameve

ending credits (plays about 2 minutes into the credits.)