Britney and boyfriend Jason Trawick were spotted leaving Barneys on Tuesday.
Britney looked visibly uspset sitting next to Jason, crying and hiding her face from the paparazzi.
One photog claims things got pretty serious, saying:
"It was so strange. Britney was driving and they just started fighting and it was getting really heated. At a stop light they didn't even care that photographers were watching what was going on - Britney was crying and Jason was upset, and she seemed very aggressive towards him. It was definitely something serious."
According to LaineyGossip.com, Britney allegedly punched Jason in the face at one point.
Hope she's OK!