Sources close to Bree (pictured left) tell us ... the gang was in Toronto on Saturday morning, where Sheen had performed the night before, when Olson decided she couldn't hang with Charlie anymore ... and split.
As we previously reported, Bree left the gang back in March ... but reconciled with Sheen and rejoined the gang.
We're told Sheen's OTHER goddess, Natalie Kenly (pictured right), is still a member of Team Win.
UPDATE: TMZ just spoke with Bree ... who told us she DID leave Saturday morning -- but not for good.
Bree says she had to return home to Indiana for an upcoming court hearing stemming from her DUI -- but insists she'll be rejoining the tour as soon as the hearing ends.
Bree says, "I am 100% still one of Charlie's goddesses."