The "Oops…I Did It Again" singer's first major gig was starring in the '90s Disney variety show at the young age of 11, alongside fellow future celebs like Christina Aguilera, Justin Timberlake, Ryan Gosling and Keri Russell. Now, almost 25 years later, Spears has become a pop icon and global superstar.
"It was a really good time," Spears, 36, exclusively told ET's Nancy O'Dell during their recent sit down in Los Angeles. "It was a great time. It was probably one of the most special times in my life, The Mickey Mouse Club."
The "Stronger" songstress has no objections to reuniting the entire cast, telling ET, "They would have to plan it. I would definitely show up. I would go, definitely."
See "Mickey Mouse Club" Mouseketeers through the years:
Following her time on the show, Spears' illustrious career kicked off with the release of "...Baby One More Time" in early 1999. Though the single is approaching its 20th anniversary, the singer says it feels like not much time has passed.
"It doesn't. It's been so fast. I feel like I just started yesterday," she expressed. "It's like everything still feels very new, which I guess is a blessing. But it's been a rollercoaster. I've had my manager [Larry Rudolph] for 17 years."
While Spears has had plenty of career triumphs and personal ups and downs, she may be working harder than ever before. As far as what advice she would give the Britney from 20 years ago, she says, "I would tell that Britney just to believe in yourself, and never doubt yourself. Be strong, and be you."
See Britney Spears' transformation through the years:
For now, the mother of two continues to have a jam-packed schedule with her tour and launch of her brand-new fragrance Prerogative, the singer's first unisex scent that is now available at Walmart and Kohl’s stores, as well as online.
"It's so bold," Spears says of the new fragrance. "There is no judgement and no labels. And it's very fresh and empower[ing] for men and women."