09/20/2013 at 03:00 PM EDT
Her new song
, "Work B––––," is a dance anthem, but Britney Spears
says her upcoming album, which is due out in December, features more than a little heartbreak.
"It's the most personal album I've done," Spears, 31 admitted Friday on On Air with Ryan Seacrest
. "After having a huge breakup this year, I had a lot to say in the studio, so it was really nice to have a therapy like that and to be able to share that with my fans … so it's a real personal album."
The "huge breakup" she's referring to is her January split
with fiancé Jason Trawick. The pair, who were engaged for a year, began dating in 2009, but Trawick had long been a part of Spears life as a member of her management team.
The mom of two
– who's set to begin a two-year residency at Planet Hollywood in Las Vegas on Dec. 27 – isn't worried about reliving the bad times with her ex when she performs the songs in concert.
"Usually the stuff that really comes from the heart is usually the best stuff and has the best beat and really kind of helps you get over the breakup really easy, 'cause you sing about it and have to think about it every night but then you're like, 'It's okay! I'm performing now so it's totally fine.' You get over it and it's like a therapeutic way to get over it."
Spears, who's now dating lawyer David Lucado
her "Britney: Piece of Me
" Vegas show on Good Morning America
on Tuesday but admitted that things didn't go smoothly as she flew on a helicopter to a remote location in the desert to make the announcement.
The singer got sick as what was supposed to be a 10 to 15 minute ride turned into 50 minutes spent circling over the location.
"I'm a horrible flyer and then at one point we couldn't circle anymore," she said. "We had to stay in one place so we could shoot the people [who were on the ground holding cards to make a giant picture of Spears] and the helicopter kept dropping and going lower. I just got really, really nauseated, and I thought I was going to throw up on everybody. It was really embarrassing! I was like, 'Oh God, you've got to get me on the ground now!' "