To be fair, NONE of the girls from our generation are legends YET
(regardless of what Britney fans think). First of all, 20 years in the game is a must, they're all on their way. Christina has already started to fade so she won't make it unless she has a comeback like Mariah. Beyonce is in the lead and I'm not saying it because I'm a stan, i'm saying it because it's true. Legends are not made from album sales and costumes. Legends are made from performances, critical acclaim, awards, music, talent, and etc.... Being a legend and an icon are two very different things that simpletons on ATRL can't seem to grasp. Tina Turner is a legend, Marilyn Monroe is an icon.
See the difference.