"The company said it "apologizes to Britney Spears and her fans for any confusion."
A Sony spokeswoman refused to comment further. A Twitter spokesman did not return emails seeking comment.
The 35-year-old international superstar and Grammy Award winner is "is fine and well," Spears' manager Adam Leber told CNN.
In the first of several false tweets on Monday, the company's Sony Music Global Twitter account published a short message reading "RIP @britneyspears" and "#RIPBritney 1981-2016," along with a teary-eyed emoji, Variety and Billboard magazines reported.
The fake tweets were soon removed. In some tweets, the group OurMine took responsibility, Billboard reported.
The Twitter account of folk music icon Bob Dylan may also have been subjected to a hoax, Billboard reported, when it sent out a now-deleted tweet reading "Rest in peace @britneyspears."
The Sony spokeswoman confirmed that Bob Dylan is also a Sony artist and that the company's statement "holds true for what's happened."