Rihanna's "American Oxygen" triumphed in its first week of Pop Clash! This round, her song is up against Adam Lambert's "Ghost Town." Which track should win the Pop Clash?

Rihanna's politically charged "American Oxygen" tackles the myth of the American Dream as she sings, "You say, you see, this is the American Dream / Young boy, hustlin' / Tryna get the wheels in motion / But he can be anything at all / America, America / I say, can't see / Just close your eyes and breathe." She makes a powerful statement, especially in the song's video, which features images tied to the American image.

On the other hand, Adam Lambert's "Ghost Town" is, well, haunting. From the first strums of the guitar to the EDM-tinged chorus, the former American Idol singer pours emotion into his new single. Adam's loneliness is palpable as he sings, "Walking the streets / Of some old ghost town / I tried to believe / In God and James Dean / But Hollywood sold out / Saw all of the saints / Lock up the gates / I could not enter / Walked into the flames / Called out your name / But there was no answer." The picture he paints is one which any person who's suffered loss can understand.

Which song should win the Pop Clash? You can vote for Rihanna's "American Oxygen" or Adam Lambert's "Ghost Town" once an hour until the polls close at 3PM ET on May 4.

Watch Rihanna's "American Oxygen" Video

Listen to Adam Lambert's "Ghost Town"