Band Or Solo Artist?: Both
Band Name(s): No Doubt
Genre: Pop, Rock, Ska
Greatest Hit: "Don't Speak" (1996)

Gwen Stefani became the Queen of Cool when she made her musical debut as the lead singer of No Doubt in the early '90s. Her California ska style and haunting voice on Tragic Kingdom, coupled with her undeniable attractiveness and signature platinum blonde hair, catapulted the singer into stardom. After her band established itself as one of the greatest acts in music history, Stefani was able to launch an award-winning solo career.

After almost a decade-long break, No Doubt released new music earlier this fall. Judging by her energy on stage, the incredibly youthful 42-year-old mother of two is still one of the most electric women in music.