Britney Spears has performed nearly 100 shows at Planet Hollywood Las Vegas since the release of her eighth studio album, 2013's Britney Jean. And though the singer has been back in the studio as far back as September -- working on a forthcoming duet with Iggy Azalea, among other tracks -- don't expect a proper follow-up anytime soon.

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"I'm gonna do [a new album] slowly but surely," Spears tells Billboard for the latest cover story, out Friday, March 13. "There's a lot going on with my kids and schools and, you know, adding new sports and stuff like that. I'm gonna try to do my best to do an amazing album, but it's not my full priority right now." The mother of sons Sean Preston, 9, and Jayden James, 8, then added with a laugh, "Kids can drive you crazy."

Britney Jean debuted at No. 4 on the Billboard 200 in December 2013, with first-week sales of 107,000 copies (her lowest debut for a studio set.) The album included the Hot 100-charting singles "Work Bitch" (No. 12) and "Perfume" (No. 76), both of which Spears performs in her Vegas show Piece Of Me. Through Feb. 21, Spears' performances have grossed more than $42 million in ticket sales, according to Planet Hollywood parent company Caesars Entertainment, and the singer is officially committed to the residency through the end of 2015. 

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However, Spears and Planet Hollywood are currently in negotiations about extending the show another two years through 2017, so a new full-length album may still prove harder to squeeze in. "Right now we're just concentrating on putting out a few great singles as they come," says Spears' manager Larry Rudolph. "We're not really talking seriously about a new album yet. Albums just aren't as important in the digital age as they used to be. Britney will get to one eventually, but not right now."