With Britney Spears securing a spot in the Pop Clash Hall of Fame, it's time for a new song duel. This week, fans can vote for one of two former 'X Factor' girl groups (or both, if you love them equally) -- Little Mix are in the running with their 'DNA' single 'How Ya Doin',' featuring Missy Elliott, while Fifth Harmony compete with their 2013 single 'Miss Movin' On.'

'How Ya Doin'' finds Leigh-Anne, Jade, Jesy and Perrie throwing major sass at a guy who's old news. The bouncing beat has a throwback vibe, with a groovy, R&B rhythm reminiscent of the '90s. It's a great sing-along perfect for the dance floor, with the Little Mix gals harmonizing, "Hey, how ya doin'? Sorry you can't get through / Why don't you leave your name and your number? / I will get back to you." Throw in a verse from the inimitable Missy Elliott, and this track is a definite winner for Little Mix.

Meanwhile, Fifth Harmony are taking a page out of the Kelly Clarkson handbook on their empowering breakup single 'Miss Movin' On.'  Though not as dance-y as 'How Ya Doin',' this "kiss off" song is climactic, with its twinkling, swelling verses that lead into heavier electro sections on the chorus. Speaking of the refrain, we dare you not to try and belt along when Camila sings, "I'll never be that girl again / No oh oh." It'll send chills up your spine!

So, which song has won you over this week? Vote for Little Mix's 'How Ya Doin'' or Fifth Harmony's 'Miss Movin' On' below! You can vote up to once per hour until the poll closes on July 22 at 3PM ET. Good luck!

Watch the Little Mix 'How Ya Doin'' Video Feat. Missy Elliott

Watch the Fifth Harmony 'Miss Movin' On' Video 

Rules of Pop Clash: The artist and song with the most votes wins, and the winner goes on to face a different challenger the following week. If an artist wins four weeks in a row, they will be retired into the Pop Clash Hall of Fame in order to give others a chance to compete.

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