4. “Glam”-[lastfm link_type="artist_info"]Christina Aguilera[/lastfm]

Phot by Stephen Lovekin//Getty Images

Christina Aguilera has vacillated between being “dirty” and being “stylish,” but she’s always been “glam.”

Runway on fire, fashion gods inspire/Lose control, inhibitions run wild/Get on the floor in your best couture/Come on and take me higher