Britney Spears & the Understatement of the Year: "My 20s Were Horrible!"

Following her performance at the Apple Music Festival in London, Brit Brit sat down for an interview with Britain's ITV on Thursday, where she revealed why she's in a much happier place these days than her past.

"I like my 30s way more than my 20s," the now 34-year-old singer said. "My 20s were horrible! [Being] in my teens was fun, but I like my 30s."

Let's take a look at her 20s for a second ...

In 2004 alone, when she was 22, Spears had a 55-hour marriage that was quickly annulled, canceled a tour after injuring her knee, and hooked up with backup dancer Kevin Federline before marrying him later that year. In 2005, the two welcomed their first son, Sean Preston, together and starred in one of the worst reality TV shows ever, "Chaotic." The duo would split the following year, after Britney gave birth to their second son, Jayden James.

In 2007, when she was 25, Britney went to rehab, shaved her head, attempted a comeback with a now-infamous VMA performance and lost custody of her children. When she was 26, the "Toxic" singer was placed under a 5150 hold and a conservatorship that remains to this day.

So, yeah, "horrible" is a bit of an understatement.

"My 30s are great," she added on ITV. "You know who you really are."

While she's had a string of relationships recently, including ex-fiance Jason Trawick, David Lucado and Charlie Ebersol, she's flying solo right now ... and totally feelin' it.

"It's okay to be single!" she said. "I'm in a really good place right now. I'm loving myself every day and learning who I am. It's awakening, it's cool."