Britney: I'd Love a Voice Like Christina's

N E W   Y O R K, Nov. 13 -- Who wouldn't want to be Britney Spears? At 21 years old, she has three multi-platinum albums and her own movie under her belt, and legions of adoring fans around the world.

But in an exclusive interview with ABCNEWS Primetime's Diane Sawyer, Spears admitted that even she has things about herself that she's not enthusiastic about.

"Do I like my voice? Um — I think my voice is — oh, I'll be completely honest: I think my voice is OK," she said.

She went on to mention a couple of her rivals, Christina Aguilera and Whitney Houston. "I would love to have a voice like Christina. I would love to have a voice like Whitney Houston," she said.

After a trying year for Spears — with a much-publicized breakup from former 'N Sync member Justin Timberlake — she is releasing a new CD, In the Zone, this week.

With a more mature sound than the young singer's previous work, the new album is considered a make-or-break step. It could possibly provide a bridge from her teenybopper fan base to an older audience. "I think I'm a little nervous about my album coming out," she said.

A Tough Year

This has been a tough year for Spears, and the thought of it all brought her to tears in her interview.

In Mexico City this July, she made an obscene gesture to the paparazzi, and then, on the last night of her world tour — five songs into her concert — she walked off stage in front of 50,000 fans.

She says she left because it was raining — and dangerous to be on stage. A documentary even shows her and her tour manager agonizing over what to do backstage. But out front, the crowd turned and started yelling: "Fraud, fraud."

Just four months earlier, in London, she insulted fans by showing up late to her movie premiere, refusing autographs — and barely saying hello.

And on top of it all, she broke up with Timberlake, her longtime boyfriend from back in their Mouseketeers days.

"It was pretty rough," she said. "Yeah. Yeah, it was kind of weird. Weird. Hello. Um, oh my goodness.

"I'm embarrassed. Can we stop?" she asked.