Competition in hip-hop and R&B keeps artists on their toes. Welcome to The Boombox Battle, where each week two songs from some of your favorite rappers and singers in the game will go head-to-head for the big win.

This week, Iggy Azalea's 'Fancy' and Future's 'Move That Dope' enter the competition.

Iggy Azalea joins forces with pop-rock singer Charli XCX. The Australia native uses her sharp lyrics to prove that she's the flyest chick in the game while Charli adds to the coolness with the hook. The video for the track also pays homage to the'90s teen cult classic 'Clueless,' in which Iggy shows her best California girl attitude while channeling Cher.

“First things first I’m the realest / Drop this and let the whole world feel it / I’m still in the murda bizness / I can hold you down like I’m giving lessons in Physics,” Iggy delivers.

Meanwhile, Future's 'Move That Dope' enlists the help of Pharrell, Pusha T and Casino. Whatever you feel about the substance, there's no denying how catchy the track is. Each artist delivers witty rhymes and the posse cut serves as a great debate starter on who has the best verse -- Pharrell takes our vote.

"Whippin' the yam, whippin and flippin' the yam / Turn the whole brick to a Lam / Re-rockin' the dope, soon as it get off the boat / Keepin' it soft like a mink / Gold on my link, coke in the sink," Future spits.

What will come of this rap battle of the sexes? Will Iggy Azalea's rap-meets-pop vibe win this week? Or will the dope-celebrating track by Future and his crew take the crown? Find out next week. Vote for your favorite song in the poll below. Remember you can vote once per hour until the poll closes on Tues., April 22, at 10AM ET.

Listen to Future's 'Move That Dope' Feat. Pharrell, Pusha T & Casino

Listen to Iggy Azalea's 'Fancy' Feat. Charli XCX

Rules of The Boombox Battle
Two artists compete against each other each week. The triumphant artist goes on to compete in the next The Boombox Battle. If an artist wins four straight The Boombox Battles, the song will be honored in The Boombox Battle Hall of Fame.