With their flirty, forthright new-millennium twist on the girl-group ideal, The Pussycat Dolls dug their stiletto heels into the pop charts during the ‘00s. Led by the sultry Nicole Scherzinger and shepherded by the savvy Robin Antin, the group hit big with sparkling electro-pop like the taunting club anthem “Don't Cha” and the heartfelt “Hush Hush." And don't forget about their big-name collaborations, including the Snoop Dogg-assisted seduction “Buttons” and the playful “Beep,” featuring will.i.am.