Britney Spears announced she is single following a public critique of her recent boyfriend, Paul Richard Soliz, on social media.

Spears, 42, took to Instagram on Sunday to question Soliz’s behavior during a paparazzi encounter after her conservatorship case was settled in April. She described an incident where Soliz allegedly drove at high speeds in a residential area while being followed by a photographer.

“Why was he going 90 [m.p.h.] in a neighborhood with one pap following only to roll the window down when the pap pulls to the side of me?” Spears wrote. She added that Soliz then called his mother.

The singer expressed distress over Soliz lowering the car window while she was crying in the passenger seat. Following these comments, Spears posted a cryptic quote about having a “savage” attitude but a heart of gold.

Spears then declared herself “single as f—” and, in a since-deleted post, vowing to...