Mixed groups are a rarity among the pop idol set, but that isn't the only thing that sets this Popstars-born fivesome apart. Liberty X took their cues from Quiet Storm and funk influences, giving the likes of Chaka Khan and Mantronix a makeover in glossy, modern contexts; the group's male-female interplay added a flirtatious charge to their sophisticated yet playful sound. Their time in the spotlight was brief, but Liberty X's melding of post-millennial innovations and R&B influences from earlier decades continues to sound fresh.