Lady Gaga's on fire! There's no competition when she's up against the likes of Lorde, Christina Perri and Britney. This week we have Gaga's 'Do What U Want' up against Katy Perry's 'Dark Horse,' and if Mother Monster wins... she'll be inducted into the Pop Clash Hall of Fame!

Lady Gaga x R. Kelly ooze sex in their collabo ‘Do What U Want,' but if you dig deeper, it can also be about Gaga's struggle with the tabloid media: "I feel good, I walk alone / But then I trip upon myself and I fall / I, I stand up, and then I’m okay / But then you print that s–t / That makes me want to scream.” Either way, Gaga's making a statement about the struggle between mind versus heart, all while getting us grooving on the dance floor.

Katy Perry also has a message for her lover, as presented in 'Dark Horse.' She's ready for love, but make sure you take it (and her) seriously, because as Juicy J says quite frankly, "there's no turning back." If that doesn't scare you, these lyrics will: "So you wanna play with magic / Boy, you should know what you’re falling for / Baby do you dare to do this / Cause I’m coming at you like a dark horse." Sonically, 'Dark Horse' sounds like something Rihanna would put out -- so we like hearing this new side of the 'ROAR' songstress.

So who will it be --  Lady Gaga or Katy Perry? Vote once an hour until the polls closes at 3PM ET on December 30, 2013.

Listen to Lady Gaga, 'Do What U Want' Feat. R. Kelly Video

Listen to Katy Perry, 'Dark Horse' Feat. Juicy J