She's arguably bigger than Christina and Britney at the moment, which is ironic since she was basically signed to RCA and shipped to New York to record (after singing the national anthem at a basketball game) specifically to replicate their success. She's a good actress and a really sweet person from what I gather with her recent interview on Marc Maron's podcast.
Does anyone remember her being an MTV VJ at the same time she was opening for Backstreet Boys? Those were the days.