Elly Jackson emerged in the mid-'00s as La Roux, packing a winning combination of wounded vocals and adventurous, synth-heavy club beats that made her one of the era's most glamorous acts. On sleek, airy dance hits like “Bulletproof” and “Kiss and Not Tell,” Jackson sounds defiant and vulnerable at once, delivering her singles with gutsy emotion and an infectious energy. Her bangers bring serious dance-floor firepower. But like her spiritual ancestor Annie Lennox, Jackson's an old-school belter at heart, capable of taking the drama of ballads like "Let Me Down Gently" into the stratosphere.