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Britney Spears is once again a solo artist.
The 28-year-old pop princess and her talent-agent boyfriend Jason Trawick called it quits at the end of February after about a year of dating, a source exclusively tells E! News.
"They were fighting a lot and have not been getting along," the source says.
William Morris Endeavor Entertainment, where Trawick plies his trade, confirmed Tuesday that the 38-year-old agent is still representing Spears. A rep for the blond-again Circus star has not yet responded to a request for comment.
Meanwhile, this isn't the first time the business-and-pleasure-mixing duo have required some time apart.
Spears and Trawick cooled off over the holidays in December, but rekindled the flame in time to attend the Grammys together on Jan. 31, where Spears was nominated for Best Dance Recording for "Womanizer."
They were last seen in public together on Valentine's Day at a McDonald's drive-thru in L.A.
"They both just needed to take a break from each other," the source says. "It wasn't working out."
Just as it wasn't the other time they split up within the last three months, but, as our insider says, reconciliation remains on the table.
(Originally published March 16, 2010, at 3:45 p.m. PT)
We're going to wait until this on-again, off-again duo make up their minds before adding them to our Big Celebrity Splits gallery.