2. Come On Over (All I Want Is You) - Christina Aguilera
Before this single from her debut album was released, Aguilera already saw mainstream success with "Genie in a Bottle" and "What a Girl Wants" in 1999. Aguilera's single "Come On Over Baby (All I Want Is You)" is extremely catchy and like most of her singles at the time, reached #1 on the U.S. Billboard Hot 100 chart. What Christina Aguilera brought to pop music in 2000 was an extremely powerful voice singing dance floor anthems everywhere. She used that powerful voice to gain success throughout the 2000s, and currently, she is a judge on the singing competition show, The Voice. Even at 33 years old, Aguilera is still one of the prettiest pop singers out there today. And yes, she is 33. I know; I can't believe it either.